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).
Production of 5-perfluoroalkyldihydrouracil derivatives
申请人:Sagami Chemical Research Center
公开号:US04581452A1
公开(公告)日:1986-04-08
A process for preparing a 5-perfluoroalkyl-dihydrouracil derivative of the general formula ##STR1## wherein R.sub.f represents a perfluoroalkyl group, each of R.sup.1 and R.sup.2 represents a hydrogen atom, or an alkyl, cycloalkyl, aryl, aralkyl or heterocyclic group, and Y is an oxygen or sulfur atom, which comprises (a) reacting a compound of the general formula ##STR2## wherein X represents a halogen atom or hydroxyl group, with a urea derivative of the general formula ##STR3## provided that when X is a hydroxyl group and at least one of R.sup.1 and R.sup.2 is a hydrogen atom, said reaction is carried out in the presence of a condensing agent, or (b) cyclizing a compound of the general formula ##STR4## and a novel intermediate compound of the above formula (IV).