-
公开(公告)号:US06225484B1
公开(公告)日:2001-05-01
申请号:US09373263
申请日:1999-08-12
申请人: Werner Simon , Thomas Petry
发明人: Werner Simon , Thomas Petry
IPC分类号: C07C5100
CPC分类号: C07C67/31 , C07C67/343 , C07C69/734 , C07C69/732
摘要: The invention relates to an improved process for the preparation of a compound of formula I wherein R1 represents an optionally substituted aryl group, R2 represents an optionally substituted alkyl group, and R3 and R4 each individually represent an alkyl group; which comprises heating a mixture of a compound of formula II an alcohol, a tri-alkoxymethane, an acid and, optionally, an inert diluent.
摘要翻译: 本发明涉及一种制备式I化合物的改进方法,其中R1表示任选取代的芳基,R 2表示任选取代的烷基,R 3和R 4各自独立地表示烷基; 其包括加热式IIan醇化合物,三烷氧基甲烷,酸和任选的惰性稀释剂的混合物。