Studies into diastereoselective Dötz benzannulations for the synthesis of axially chiral biaryls
摘要:
A series of racemic chiral ortho substituents on 1-phenythex-1-yne have been found to control the atroposelective formation of a biaryl from Dotz benzannulation with pentacarbonyl(methoxyphenylmethylene)chromium(0). The results show there is a subtle balance between the chiral ortho substituent controlling atroposelectivity with a dr 3-5:1 and allowing benzannulation to proceed in yields of 44-67%. (C) 2003 Elsevier Ltd. All rights reserved.
Studies into diastereoselective Dötz benzannulations for the synthesis of axially chiral biaryls
作者:James C Anderson、John W Cran、N.Paul King
DOI:10.1016/j.tetlet.2003.08.096
日期:2003.10
A series of racemic chiral ortho substituents on 1-phenythex-1-yne have been found to control the atroposelective formation of a biaryl from Dotz benzannulation with pentacarbonyl(methoxyphenylmethylene)chromium(0). The results show there is a subtle balance between the chiral ortho substituent controlling atroposelectivity with a dr 3-5:1 and allowing benzannulation to proceed in yields of 44-67%. (C) 2003 Elsevier Ltd. All rights reserved.
Synthesis of Indenyl Ethers by Gold(I)-Catalyzed Intramolecular Carboalkoxylation of Alkynes
作者:Pascal Dubé、F. Dean Toste
DOI:10.1021/ja064209+
日期:2006.9.1
The gold(I)-catalyzed carboalkoxylation of alkynes to form indanone derivatives from readily available ortho-acetylenic benzylic ethers is described. Importantly, the gold(I)-catalyzed rearrangement of enantioenriched benzylic ethers proceeds with chirality transfer, thus providing a practical method for the enantioselective synthesis of indenyl ethers.