Copper-Catalyzed Intramolecular Desymmetric Aryl CO Coupling for the Enantioselective Construction of Chiral Dihydrobenzofurans and Dihydrobenzopyrans
作者:Wenqiang Yang、Yangyuan Liu、Shasha Zhang、Qian Cai
DOI:10.1002/anie.201503882
日期:2015.7.20
O‐Heterocyclic structures such as 2,3‐dihydrobenzofurans are key motifs in many natural compounds and pharmaceuticals. Enantioselective formation of chiraldihydrobenzofurans and analogues was achieved through a copper‐catalyzed desymmetrization strategy with a chiral cyclic 1,2‐diamine. A broad range of substrates are compatible with this CuI‐diamine catalytic system and afford the desired coupling
Expedient Drug Synthesis and Diversification via ortho-C−H Iodination using Recyclable PdI<sub>2</sub> as the Precatalyst
作者:Tian-Sheng Mei、Dong-Hui Wang、Jin-Quan Yu
DOI:10.1021/ol1010483
日期:2010.7.16
Pd(II)-catalyzed ortho-C H iodination reactions of phenylacetic acid substrates have been achieved using recyclable Pdl(2) as the precatalyst. This class of substrates is incompatible with the classic amide formation/ortho-lithiation/iodination sequence. The power of this new technology is demonstrated by facile drug functionalization and drastically shortened syntheses of the drugs diclofenac and lumiracoxib.