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Novel optically active oligothiophenes bearing electron‐donating chiral side chains have been prepared by synthetic methods suitable to achieve regioregular head‐to‐tail and head‐to‐head/tail‐to‐tail derivatives. In particular, the chiral (S)‐(2‐methyl)butyl moiety was linked at position 3 of the thiophene ring through heteroatoms, such as S or O, to evaluate its effect on the macro molecular aggregation...
We present aspects of emerging optical activity in thin racemic 1,1′‐Bi‐2‐naphthol films upon irradiation with circularly polarized light and subsequent resonant two‐photon absorption in the sample. Thorough analysis of the sample morphology is conducted by means of (polarization‐resolved) optical microscopy and scanning electron microscopy (SEM). The influence of crystallization on the nonlinear...
Over last decade, the use of Ni(II) complexes, derived from of glycine Schiff bases with chiral tridentate ligands, has emerge as a leading methodology for preparation of structurally diverse Tailor‐Made Amino Acids, the key structural units in modern medicinal chemistry, and drug design. Here, we report asymmetric synthesis of derivatives of (S)‐α‐(octyl)glycine ((S)‐2‐aminodecanoic acid) and its...
Candida antarctica (CAL‐B) lipase‐catalyzed resolution of 1,3‐dialkyl‐3‐hydroxymethyl oxindoles has been performed to obtain (R)‐1,3‐dialkyl‐3‐acetoxymethyl oxindoles with up to 99% ee and (S)‐1,3‐dialkyl‐3‐hydroxymethyl oxindoles with up to 78% ee using vinyl acetate as acylating agent and acetonitrile as solvent transforming (S)‐3‐allyl‐3‐hydroxymethyl oxindole to (3S)‐1′‐benzyl‐5‐(iodomethyl)‐4,5‐dihydro‐2...
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