Patent ID: 7550607

Claim:
A process for preparing compound of formula H comprising contacting compound of formula G under conditions suitable to produce compound of formula H, wherein: a) R 1 is selected from the group consisting of alkyl, substituted alkyl and aryl; b) R 2 and R 5 are independently selected from the group consisting of hydrogen, alkyl, substituted alkyl and aryl; c) R 3 =R 4 =R 6 =R 7 =hydrogen, or R 3 , R 4 , R 6 , R 7 are selected such that three out of four are hydrogen and the fourth is selected from the group consisting of alkyl, substituted alkyl and aryl; and d) R 9 is selected from the group consisting of hydrogen, alkyl, substituted alkyl, aryl and hydroxyl protecting group.