Patent ID: 8101757

Claim:
A process for the preparation of compound 2 from compound 1 according to the following reaction: wherein: R 1 is selected from the group consisting of hydrogen, hydrocarbyl and substituted hydrocarbyl; R 1a is an oxygen protecting group; R 2 is selected from the group consisting of alkyl and aryl; R 3 , R 4 and R 5 , are independently selected from the group consisting of hydrogen, halogen, hydroxyl, methoxy, {—}OR 8 , hydrocarbyl, and substituted hydrocarbyl; R 6 is selected from the group consisting of hydrogen, halogen, hydroxyl and hydrocarbyl; R 8 is selected from the group consisting of hydrocarbyl, and substituted hydrocarbyl; and X is halogen selected from the group consisting of Cl, and Br.