Routes from 1,1-cycloalkanedicarboxylic acids to geminal bis(polyfluoromethyl) substituted carbocycles
摘要:
1-Fluoroformyl-1-1(trifluoromethyl)cycloalkanes (1), prepared by treatment of 1,1-cycloalkane-dicarboxylic acids with SF4, were efficiently reduced to 1-hydroxymethyl-1-(trifluoromethyl)-cycloalkanes (2). Routes for the conversion of alcohols 2 to 1-methyl-1-(trifluoromethyl) cycloalkanes (4), 1-fluoromethyl-1-(trifluoromethyl)cycloalkanes (6) and 1-difluoromethyl-1-(trifluoromethyl)cycloalkanes (8), via iodides 3, triflates 5 and aldehydes 7, respectively, were investigated. (C) 2001 Elsevier Science B.V. All rights reserved.
Selective reactions of 1,1-cycloalkanedicarboxylic acids with SF4. A route to 1,1-bis(trifluoromethyl)cycloalkanes, 1-fluoroformyl-1-(trifluoromethyl)cycloalkanes and 1-(trifluoromethyl)-1-cycloalkanecarboxylic acids
作者:Wojciech Dmowski、Adam Wolniewicz
DOI:10.1016/s0022-1139(99)00233-x
日期:2000.3
Six-, five-, four- and three-membered 1,1-cycloalkanedicarboxylic acid (2a–d) were synthesized by alkaline hydrolysis of the corresponding diesters (1a–d) and the reactions of the formers with SF4 were investigated. 1,1-Bis(trifluoromethyl)cycloalkanes (3a–d) were the products of the reactions conducted at 120–150°C while at 30°C 1-fluoroformyl-1-(trifluoromethyl)cycloalkanes (4a–d) were exclusively
Routes from 1,1-cycloalkanedicarboxylic acids to geminal bis(polyfluoromethyl) substituted carbocycles
作者:Adam Wolniewicz、Wojciech Dmowski
DOI:10.1016/s0022-1139(01)00353-0
日期:2001.7
1-Fluoroformyl-1-1(trifluoromethyl)cycloalkanes (1), prepared by treatment of 1,1-cycloalkane-dicarboxylic acids with SF4, were efficiently reduced to 1-hydroxymethyl-1-(trifluoromethyl)-cycloalkanes (2). Routes for the conversion of alcohols 2 to 1-methyl-1-(trifluoromethyl) cycloalkanes (4), 1-fluoromethyl-1-(trifluoromethyl)cycloalkanes (6) and 1-difluoromethyl-1-(trifluoromethyl)cycloalkanes (8), via iodides 3, triflates 5 and aldehydes 7, respectively, were investigated. (C) 2001 Elsevier Science B.V. All rights reserved.