Patent ID: 8383814

Claim:
A process for preparing a compound of formula (18): wherein m is 1 or 2; n is 1 or 2; p is 1 or 2; R 1 is hydrogen, (C 1 -C 4 )alkyl, CF 3 , or (C 1 -C 4 )alkoxy-(C 1 -C 4 )alkyl; and R 2 is hydrogen, halogen, (C 1 -C 4 )alkyl or CF 3 ; said method comprising a) condensing an aldehyde of formula (16): wherein n is as defined for the compound of formula (18); with a compound of formula (12): wherein R1, R2, m and p are as defined for the compound of formula (18); in the presence of a reducing agent, to provide the compound of formula (17): wherein R1, R2, m, n, and p are as defined for the compound of formula (18); and b) cyclizing the compound of formula (17) in the presence of a base to provide the compound of formula (18).