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A three-step protocol toward 1,1,2-triarylethanes 1 starting with β-ketosulfones 2 is developed. A facile process is carried out for the (1) reduction of 2 with NaBH4, (2) BF3·OEt2-mediated Friedel-Crafts reactions of the resulting β-hydroxy sulfones 3, and (3) palladium-catalyzed desulfonylative cross-coupling of the corresponding 5 with aryl iodides 4 in the presence of t-BuOK under warming DMF...
We reported the design and synthesis of a new type of metal-cation probes, 3-hydroxy-4-(1,4,7,10-tetraoxa-13-azacyclopentadec-13-ylmethyl)naphthalene-2-carbaldehyde (1a) and its single hydrogen-bond analogue 1-(1,4,7,10-tetraoxa-13-azacylopentadec-13-ylmethyl)-2-naphthol (2a), in which 1-aza-15-crown-5 ether in combination with the naphthol oxygen acts as a receptor, while the mechanism of excited-state...
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