Rhodium-mediated insertion of CF3-substituted carbenoid into O-H: An efficient method for the synthesis of α-trifluoromethylated alkoxy- and aryloxyacetic acid derivatives
摘要:
CF3-substituted diazo compound 2 undergoes a facile rhodium carbenoid mediated O-H insertion reaction with a variety of alcohols and phenols to afford the title compounds in good yield. Use of the title compounds as synthetic precursors for other fluorinated molecules is exemplified by the transformation of the product 3b, into beta, beta-difluoro-alpha-ketoester 5 and alpha-hydroxyketone 8.
Synthetic Applications of the Carbanion with a Fluoroalkyl Group Generated by Palladium(0) Catalyst under Neutral Conditions
作者:Yuzo Komatsu、Toru Sakamoto、Tomoya Kitazume
DOI:10.1021/jo990463r
日期:1999.10.1
fluorine atom(s) are described. Palladium(0)-catalyzedallylation reactions under neutral conditions proceeded smoothly in the system where a methylene group is activated by fluoroalkyl and carbonyl groups. In the above systems, the 2,2,2-trifluoroethyl moiety has been introduced onto the allylic position without the release of fluoride. Further, palladium(0)-catalyzed heterocyclization was achieved
Rhodium-mediated insertion of CF3-substituted carbenoid into O-H: An efficient method for the synthesis of α-trifluoromethylated alkoxy- and aryloxyacetic acid derivatives
作者:Guo-qiang Shi、Zhi-yao Cao、Wei-ling Cai
DOI:10.1016/0040-4020(95)98698-h
日期:1995.4
CF3-substituted diazo compound 2 undergoes a facile rhodium carbenoid mediated O-H insertion reaction with a variety of alcohols and phenols to afford the title compounds in good yield. Use of the title compounds as synthetic precursors for other fluorinated molecules is exemplified by the transformation of the product 3b, into beta, beta-difluoro-alpha-ketoester 5 and alpha-hydroxyketone 8.