Imidazole Transfer from 1,1‘-Carbonyldimidazole and 1,1‘-(Thiocarbonyl)diimidazole to Alcohols. A New Protocol for the Conversion of Alcohols to Alkylheterocycles
作者:Michael J. Totleben、Jeremiah P. Freeman、Jacob Szmuszkovicz
DOI:10.1021/jo9708811
日期:1997.10.1
The transfer of imidazole from 1,1'-carbonyldimidazole (CDI) and 1,1'-(thiocarbonyl)diimidazole in modest to excellent yields under mild conditions was observed with activated alcohols, unactivated alcohols generally providing the expected carbonylimidazole esters. Reasonable mechanisms for the transfer are proposed. 1,1'-Carbonyldi-1,2,4-triazole was found to work as well, providing a new heterocycle in good yield. Chemists should be aware of this reaction when treating benzylic, vinylogous benzylic, and benzhydryl alcohols with CDI-type reagents, expecting elimination of heterocycle rather than incorporation of heterocycle and elimination of CO2.
US6436954B1
申请人:——
公开号:US6436954B1
公开(公告)日:2002-08-20
Rigo, Benoit; Kolocouris, Nicolas, Journal of Heterocyclic Chemistry, 1983, vol. 20, p. 893 - 898
作者:Rigo, Benoit、Kolocouris, Nicolas
DOI:——
日期:——
RIGO, B.;KOLOCOURIS, N., J. HETEROCYCL. CHEM., 1983, 20, N 4, 893-898