Patent ID: 7273948
Filing Date: 2007-09-25
Classification: C07C

Abstract:
1. A process of manufacturing a compound of Formula I or salts thereof wherein R 1 , R 2 , R 3 , and R 4 are independently alkyl, optionally substituted by hydroxy, alkyl, alkenyl, acyl, nitro, amino, halo, carboxy and cyano; R 5 and R 6 are the same or different and independently selected from the group consisting of alkyl, alkenyl, and aryl all of which can be optionally substituted by hydroxy, alkyl, alkenyl, acyl, nitro, amino, halo, carboxy and cyano; R 5 and R 6 can come together to form a carbocyclic ring; X is selected from the group consisting of hydrogen, an optionally substituted unsaturated acyl having from 1 to 18 carbon atoms, and an optionally substituted saturated acyl having from 1 to 18 carbon atoms, said optionally substituted unsaturated acyl and optionally substituted saturated acyl optionally containing a polar or charged functionality; Y is selected from the group consisting of an optionally substituted unsaturated acyl having from 1 to 18 carbon atoms and an optionally substituted saturated acyl having from 1 to 18 carbon atoms, said optionally substituted unsaturated acyl and optionally substituted saturated acyl optionally containing a polar or charged functionality; comprising: reacting a compound of Formula II wherein R 1 , R 2 , R 3 , R 4 , R 5 and R 6 are as previously defined, with a Grignard Reagent to form a magnesium salt or a reagent selected from the group consisting of an alkyl lithium, alkenyl lithium, alkynyl lithium, aryl lithium, aralkyl lithium, and a heteroaryl lithium, all which can be optionally substituted to form a lithium salt; reacting said magnesium salt or lithium salt with a compound selected from the group consisting of a saturated or unsaturated acyl halide, saturated or unsaturated carboxylic acid anhydride and a saturated or unsaturated activated carboxylic acid ester, all of which may optionally be substituted by one or more selected from the group consisting of protected hydroxy, alkyl, alkenyl, acyl, nitro, protected amino, amino, halo, protected carboxy and cyano; separating and isolating said compound of Formula I.