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article

Palladium(II)-catalyzed tandem annulation reaction of o-alkynylbenzoates with methyl vinyl ketone for the synthesis of isocoumarins

Huan Wang, Xiuling Han, Xiyan Lu, H. Wang, more

Tetrahedron > 2013 > 69 > 40 > 8626-8631

A palladium(II)-catalyzed highly regioselective tandem reactions of o-alkynylbenzoates with methyl vinyl ketone for the synthesis of isocoumarins was developed. It is a convenient, mild and environmentally benign reaction with moderate to high yield. The reaction is initiated by the Pd(II) species and regenerate the Pd(II) species to complete the catalytic cycle without the necessity of a redox system.

article

Combining α-amidoalkylation reactions of N-acyliminium ions with ring-closing metathesis: access to versatile novel isoindolones spirocyclic compounds

Anthony Pesquet, Mohamed Othman, A. Pesquet, M. Othman

Tetrahedron Letters > 2013 > 54 > 38 > 5227-5231

A novel approach to diversely spirocyclic isoindoles has been developed by using N-acyliminium/ring-closing metathesis strategy. Spirocyclization precursors, diolefinic, and enyne spiro-fused-isoindole derivatives have been obtained by a regioselective reduction of the spiro-imide compounds, followed by the allylation of the N-acyliminium intermediates (generated from the acetoxylactam compounds)...

article

Ruthenium‐Catalysed Asymmetric Intramolecular Isomerization/Esterification Reaction: Direct Synthesis of Chiral Dihydrocoumarins

Lingzi Zhao, Xuchao Wang, Qing Qiang, Xingwei Zhao, more

Chinese Journal of Chemistry > 42 > 16 > 1828 - 1832

An asymmetric isomerization/intramolecular coupling reaction of allylic alcohols to synthesize chiral dihydrocoumarins was successfully accomplished through ruthenium catalysis. This method demonstrates a wide substrate applicability, excellent tolerance for various functional groups, and good enantioselectivities (up to 90% ee). It provides a convenient pathway to produce a diverse range of structurally...

article

Studies on the Biomimetic Synthesis of Marine Ladder Polyethers via Endo‐Selective Epoxide‐to‐Epoxonium Ring‐Opening Cascades

Jia‐Xi Xiao, Feng‐Xing Li, Shu‐Jian Ren, Jin Qu

Angewandte Chemie > 136 > 30 > n/a - n/a

Marine ladder polyethers have attracted the attention of chemists and biologists because of their potent biological activities. Synthetic chemists have attempted to construct their polyether frameworks by epoxide ring‐opening cascades, as Nakanishi hypothesis describes. However, Baldwin's rules of ring closure state that exo‐selective intramolecular cyclization of epoxy alcohols is preferred over...

article

Studies on the Biomimetic Synthesis of Marine Ladder Polyethers via Endo‐Selective Epoxide‐to‐Epoxonium Ring‐Opening Cascades

Jia‐Xi Xiao, Feng‐Xing Li, Shu‐Jian Ren, Jin Qu

Angewandte Chemie International Edition > 63 > 30 > n/a - n/a

Marine ladder polyethers have attracted the attention of chemists and biologists because of their potent biological activities. Synthetic chemists have attempted to construct their polyether frameworks by epoxide ring‐opening cascades, as Nakanishi hypothesis describes. However, Baldwin's rules of ring closure state that exo‐selective intramolecular cyclization of epoxy alcohols is preferred over...

article

The Tandem Nitrate and CO₂ Reduction for Urea Electrosynthesis: Role of Surface N‐Intermediates in CO₂ Capture and Activation

Xingmiao Huang, Yangfan Li, Shijie Xie, Qi Zhao, more

Angewandte Chemie International Edition > 63 > 24 > n/a - n/a

Electrochemical reduction of CO₂ and nitrate offers a promising avenue to produce valuable chemicals through the using of greenhouse gas and nitrogen‐containing wastewater. However, the generally proposed reaction pathway of concurrent CO₂ and nitrate reduction for urea synthesis requires the catalysts to be both efficient in both CO₂ and nitrate reduction, thus narrowing the selection range of suitable...

article

The Tandem Nitrate and CO₂ Reduction for Urea Electrosynthesis: Role of Surface N‐Intermediates in CO₂ Capture and Activation

Xingmiao Huang, Yangfan Li, Shijie Xie, Qi Zhao, more

Angewandte Chemie > 136 > 24 > n/a - n/a

Electrochemical reduction of CO₂ and nitrate offers a promising avenue to produce valuable chemicals through the using of greenhouse gas and nitrogen‐containing wastewater. However, the generally proposed reaction pathway of concurrent CO₂ and nitrate reduction for urea synthesis requires the catalysts to be both efficient in both CO₂ and nitrate reduction, thus narrowing the selection range of suitable...

article

Reduction‐Specified Coupling Reactions of Nitroarenes by Heterogeneous Cobalt Catalysis

Jia‐Lu Sun, Junwei Xi, H. Zhao, Min Zhang

Chemistry – A European Journal > 30 > 24 > n/a - n/a

The in‐depth study on reduction–specified coupling reactions of the nitroarenes by heterogeneous cobalt catalysis opens a door for diversified syntheses of functional N‐containing molecules. Guided by the structure–function relationship of heterogeneous materials, rational design of nano–catalysts can effectively regulate the routes of organic reactions. Precise transformation of the intermediates...

article

Boundary‐Rich Carbon‐Based Electrocatalysts with Manganese(II)‐Coordinated Active Environment for Selective Synthesis of Hydrogen Peroxide

Ling‐Yu Dong, Jing‐Song Wang, Tian‐Yi Li, Tao Wu, more

Angewandte Chemie International Edition > 63 > 13 > n/a - n/a

Coordinated manganese (Mn) electrocatalysts owing to their electronic structure flexibility, non‐toxic and earth abundant features are promising for electrocatalytic reactions. However, achieving selective hydrogen peroxide (H₂O₂) production through two electron oxygen reduction (2e‐ORR) is a challenge on Mn‐centered catalysts. Targeting this goal, we report on the creation of a secondary Mn(II)‐coordinated...

article

Boundary‐Rich Carbon‐Based Electrocatalysts with Manganese(II)‐Coordinated Active Environment for Selective Synthesis of Hydrogen Peroxide

Ling‐Yu Dong, Jing‐Song Wang, Tian‐Yi Li, Tao Wu, more

Angewandte Chemie > 136 > 13 > n/a - n/a

Coordinated manganese (Mn) electrocatalysts owing to their electronic structure flexibility, non‐toxic and earth abundant features are promising for electrocatalytic reactions. However, achieving selective hydrogen peroxide (H₂O₂) production through two electron oxygen reduction (2e‐ORR) is a challenge on Mn‐centered catalysts. Targeting this goal, we report on the creation of a secondary Mn(II)‐coordinated...

article

Metal‐Free Synthesis of 2‐Aminobenzothiazoles via I₂‐Catalyzed Tandem Cyclization Reaction of Amines and Carbon Disulfide

Ting Chen, Wei Feng, Ruitong Yang, Shanping Chen, more

Chinese Journal of Chemistry > 42 > 8 > 846 - 852

A convenient approach for the construction of 2‐aminobenzothiazoles via I₂‐catalyzed tandem cyclization reaction of amines and carbon disulfide has been developed. The present approach starts from simple and readily available starting materials, affording a series of 2‐aminobenzothiazoles in up to 89% yields under metal‐free conditions. In this work, C—H/N—H functionalization was achieved and multiple...

article

Stacked Covalent Organic Ribbons Perpendicular to Graphene Oxide Sheets; a 1D‐p‐2D Design for Photocatalytic Tandem Reactions

Zeynab Khazaee, Yi Ouyang, Yan Zhang, Oliver Bogojevic, more

Chemistry – A European Journal > 30 > 12 > n/a - n/a

Development of one dimensional covalent organic frameworks (1D‐COFs) with potential in light absorption and catalysis is still challenging, due to their rapid interpenetration to form 2D and 3D porous structures. Here we report a successful synthesis of imine‐linked 1D covalent organic ribbons (COR), using two simple linear building blocks 1,4‐Benzenediamine (Bda) and [2,2′‐Bipyridine]‐5,5′‐dicarbaldehyde...

article

Synthesis of Unsymmetrically Substituted [5]Helicenes by Tandem Arylation of Binaphthyl by Suzuki Coupling and C−H Activation

Filip Bulko, Juraj Filo, Marek Cigáň, Martin Putala

European Journal of Organic Chemistry > 27 > 3 > n/a - n/a

We report a step‐efficient approach for the synthesis of unsymmetrically substituted naphtho[1,2‐g]chrysenes by tandem arylation of 2,2’‐diiodo‐1,1’‐binaphthyl with arylboronic acids, which proceeds through Suzuki coupling followed by intramolecular arylation by C−H activation. Substrate screening examining over 30 meta‐ and/or para‐substituted arylboronic acids showed that this approach provides...

article

Total Synthesis of UCS1025A via Tandem Carbonylative Stille Cross Coupling and Diels‐Alder Reaction^†

Chengsen Cui, Mingji Dai

Chinese Journal of Chemistry > 41 > 22 > 3019 - 3024

We report an efficient and convergent strategy for the total synthesis of UCS1025A and its diastereomer tetra‐epi‐UCS1025A. UCS1025A is a representative member of the naturally occurring pyrrolizidinone polyketides, from which members with potent antibacterial, antifungal, and anticancer activities have been identified. Our approach features a tandem carbonylative Stille cross coupling and Diels‐Alder...

article

A Photosensitizing Metal–Organic Framework as a Tandem Reaction Catalyst for Primary Alcohols from Terminal Alkenes and Alkynes

Xiao‐Chun Lin, Yu‐Mei Wang, Xu Chen, Pei‐Ye You, more

Angewandte Chemie International Edition > 62 > 35 > n/a - n/a

Owing to the wide and growing demand for primary alcohols, the development of efficient catalysts with high regioselectivity remains a worthwhile pursuit. However, according to Markovnikov's rule, it is a challenge to obtain primary alcohols with high yields and regioselectivity from terminal alkenes or alkynes. Herein, we report the synthesis of a photosensitizing two‐dimensional (2D) metal–organic...

article

Back Cover: A Photosensitizing Metal–Organic Framework as a Tandem Reaction Catalyst for Primary Alcohols from Terminal Alkenes and Alkynes (Angew. Chem. Int. Ed. 35/2023)

Xiao‐Chun Lin, Yu‐Mei Wang, Xu Chen, Pei‐Ye You, more

Angewandte Chemie International Edition > 62 > 35 > n/a - n/a

A photosensitizing covalent metal–organic framework (CMOF) was prepared as a tandem reaction catalyst by Guo‐Hong Ning, Dan Li, and co‐workers in their Research Article (e202306497). By combining Cu‐CTUs as metal‐catalytic sites and Bodipy linkers as photosensitizers, this CMOF can catalyze terminal alkenes and alkynes to produce primary alcohols via one‐pot tandem reactions with excellent regioselectivity,...

article

Rücktitelbild: A Photosensitizing Metal–Organic Framework as a Tandem Reaction Catalyst for Primary Alcohols from Terminal Alkenes and Alkynes (Angew. Chem. 35/2023)

Xiao‐Chun Lin, Yu‐Mei Wang, Xu Chen, Pei‐Ye You, more

Angewandte Chemie > 135 > 35 > n/a - n/a

A photosensitizing covalent metal–organic framework (CMOF) was prepared as a tandem reaction catalyst by Guo‐Hong Ning, Dan Li, and co‐workers in their Research Article (e202306497). By combining Cu‐CTUs as metal‐catalytic sites and Bodipy linkers as photosensitizers, this CMOF can catalyze terminal alkenes and alkynes to produce primary alcohols via one‐pot tandem reactions with excellent regioselectivity,...

article

A Photosensitizing Metal–Organic Framework as a Tandem Reaction Catalyst for Primary Alcohols from Terminal Alkenes and Alkynes

Xiao‐Chun Lin, Yu‐Mei Wang, Xu Chen, Pei‐Ye You, more

Angewandte Chemie > 135 > 35 > n/a - n/a

Owing to the wide and growing demand for primary alcohols, the development of efficient catalysts with high regioselectivity remains a worthwhile pursuit. However, according to Markovnikov's rule, it is a challenge to obtain primary alcohols with high yields and regioselectivity from terminal alkenes or alkynes. Herein, we report the synthesis of a photosensitizing two‐dimensional (2D) metal–organic...

article

Silver‐Catalyzed Tandem Reaction of β‐Alkynyl Ketones toward Spiro[isochromene‐1,4′‐quinoline] with Anticancer Activities

Shulin Ge, Xiao‐Ying Yang, Xiuting Lv, Guiyue Fang, more

Advanced Synthesis & Catalysis > 365 > 14 > 2332 - 2337

Spirocyclic frameworks could enhance the drug‐like properties of planar bioactive molecules by increasing their three‐dimensionality, making the development of synthetic methodology and bioactivity assays for spiro compounds highly attractive. This work reported the silver‐catalyzed tandem cycloisomerization/Povarov reaction between β‐alkynyl ketones and hexahydro‐1,3,5‐triazines, access to spiro[isochromene‐1,4’‐quinoline]...

article

Gold‐Catalyzed One‐Pot Cycloisomerization/Nucleophilic Addition/Rearrangement of Acenaphthylene Carbaldehyde Derivatives

Alexis Truchon, Aurélien Dupeux, Sandra Olivero, Véronique Michelet

Advanced Synthesis & Catalysis > 365 > 12 > 2006 - 2012

Merging the latest advances in the field of gold catalysis and the efficiency of hexafluoro‐2‐propanol (HFIP), a gold‐catalyzed orthogonal tandem reaction has been developed to access carbocyclic ketone on naphthalene substrates. The methodology involved a cycloisomerization/nucleophilic addition and a C→O rearrangement. The HFIP solvent most probably acted as a Lewis‐acid on isochromene derivatives,...

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Search results

Palladium(II)-catalyzed tandem annulation reaction of o-alkynylbenzoates with methyl vinyl ketone for the synthesis of isocoumarins

Combining α-amidoalkylation reactions of N-acyliminium ions with ring-closing metathesis: access to versatile novel isoindolones spirocyclic compounds

Ruthenium‐Catalysed Asymmetric Intramolecular Isomerization/Esterification Reaction: Direct Synthesis of Chiral Dihydrocoumarins

Studies on the Biomimetic Synthesis of Marine Ladder Polyethers via Endo‐Selective Epoxide‐to‐Epoxonium Ring‐Opening Cascades

Studies on the Biomimetic Synthesis of Marine Ladder Polyethers via Endo‐Selective Epoxide‐to‐Epoxonium Ring‐Opening Cascades

The Tandem Nitrate and CO₂ Reduction for Urea Electrosynthesis: Role of Surface N‐Intermediates in CO₂ Capture and Activation

The Tandem Nitrate and CO₂ Reduction for Urea Electrosynthesis: Role of Surface N‐Intermediates in CO₂ Capture and Activation

Reduction‐Specified Coupling Reactions of Nitroarenes by Heterogeneous Cobalt Catalysis

Boundary‐Rich Carbon‐Based Electrocatalysts with Manganese(II)‐Coordinated Active Environment for Selective Synthesis of Hydrogen Peroxide

Boundary‐Rich Carbon‐Based Electrocatalysts with Manganese(II)‐Coordinated Active Environment for Selective Synthesis of Hydrogen Peroxide

Metal‐Free Synthesis of 2‐Aminobenzothiazoles via I₂‐Catalyzed Tandem Cyclization Reaction of Amines and Carbon Disulfide

Stacked Covalent Organic Ribbons Perpendicular to Graphene Oxide Sheets; a 1D‐p‐2D Design for Photocatalytic Tandem Reactions

Synthesis of Unsymmetrically Substituted [5]Helicenes by Tandem Arylation of Binaphthyl by Suzuki Coupling and C−H Activation

Total Synthesis of UCS1025A via Tandem Carbonylative Stille Cross Coupling and Diels‐Alder Reaction^†

A Photosensitizing Metal–Organic Framework as a Tandem Reaction Catalyst for Primary Alcohols from Terminal Alkenes and Alkynes

Back Cover: A Photosensitizing Metal–Organic Framework as a Tandem Reaction Catalyst for Primary Alcohols from Terminal Alkenes and Alkynes (Angew. Chem. Int. Ed. 35/2023)

Rücktitelbild: A Photosensitizing Metal–Organic Framework as a Tandem Reaction Catalyst for Primary Alcohols from Terminal Alkenes and Alkynes (Angew. Chem. 35/2023)

A Photosensitizing Metal–Organic Framework as a Tandem Reaction Catalyst for Primary Alcohols from Terminal Alkenes and Alkynes

Silver‐Catalyzed Tandem Reaction of β‐Alkynyl Ketones toward Spiro[isochromene‐1,4′‐quinoline] with Anticancer Activities

Gold‐Catalyzed One‐Pot Cycloisomerization/Nucleophilic Addition/Rearrangement of Acenaphthylene Carbaldehyde Derivatives

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