Process for preparing 5-perfluoroalkyl-5,6-dihydrouracil derivatives and compounds for use therein
申请人:SAGAMI CHEMICAL RESEARCH CENTER
公开号:EP0103436A2
公开(公告)日:1984-03-21
A process for preparing a 5-perfluoroalkyldihydrouracil derivative of the general formula
wherein Rf represents a perfluoroalkyl group, each of R1 and R2 represents a hydrogen atom, or an alkyl, cyloalkyl, aryl, aralkyl or heterocyclic group, and Y is an oxygen or sulfur atom, which comprises (a) reacting a compound of the general formula
wherein X represents a halogen atom or a hydroxyl group, with a urea derivative of the general formula
provided that when X is a hydroxyl group and at least one of R1 and R2 is a hydrogen atom, said reaction is carried out in the presence of a consensing agent, or (b) cyclizing a compound of the general formula
and a novel intermediate compound of the above formula (IV).
An Effective and Convenient Route to 5-Trifluoromethyl-5,6-dihydrouracils and their Thio Derivatives
作者:Takamasa Fuchikami、Akiko Yamanouchi、Iwao Ojima
DOI:10.1055/s-1984-30964
日期:——
New and direct route to 5-trifluoromethyl-5,6-dihydrouracils by means of palladium complex catalyzed “ureidocarbonylation” of 2-bromo-3,3,3-trifluoropropene
作者:Takamasa Fuchikami、Iwao Ojima
DOI:10.1016/s0040-4039(00)88357-4
日期:1982.1
FUCHIKAMI, TAKAMASA;OJIMA, IWAO, TETRAHEDRON LETT., 1982, 23, N 40, 4099-4100