Patent ID: 8357806

Claim:
A process for preparing a compound of formula (I) wherein n is 0, 1, 2, 3, or 4; and each R 1 is independently selected from alkoxy, alkyl, amino, aryl, cyano, halo, haloalkoxy, mercapto, and nitro; the process comprising: (a) treating a compound of formula (C) with n-butyl vinyl ether in the presence of a palladium catalytic system; (b) treating the product of step (a) with a strong acid in the presence of water; (c) treating the product of step (b) with a brominating agent to provide a compound of formula (D) (d) treating the compound of formula (D) with diformylamide in the presence of a phase transfer catalyst then treating the resulting mixture with methanol to provide a compound of formula (E) (e) subjecting the compound of formula (E) to methoxylating or methylating conditions to form a compound of formula (F) and (f) treating the compound of formula (F) with a chlorinating agent.