Patent ID: 7723529
Filing Date: 2010-05-25
Classification: C07C,C07D

Abstract:
1. A process for preparing compounds of general formula (III) comprising reacting: (a) a compound of formula (I) (b) a compound of formula (II) in the presence of dimethylaminopyridine (DMAP), or dimethylaminopyridine (DMAP) and a Lewis acid selected from the group consisting of bismuth triflate and scandium triflate, wherein: W is selected from the group consisting of: Y is a bivalent radical having the following meanings: wherein: n is an integer from 0 to 20, n1 is an integer from 1 to 20, n2 is 0 or 1; wherein the —ONO wherein X n3, n4 and n6 are integer independently selected from 0 to 20, n5 is an integer from 0 to 6, R R wherein: n7 is an integer from 0 to 10; n8 is an integer from 1 to 10; R wherein n8 is as defined above Y