Patent ID: 7157589

Claim:
A process for the preparation of a compound of formula (1) wherein X is selected from CH 2 or O; R 3 , R 4 , R 5 and R 6 are each independently selected from hydrogen or lower alkyl and, when X is CH 2 , R 5 and R 6 may be alkene groups joined to form a benzene ring and, when X is O, R 3 and R 4 and/or R 5 and R 6 together may be a methylenedioxy group of the formula: wherein R 7 and R 8 are same or different and are hydrogen, lower alkyl or are alkyl and are joined to form a cyclopentyl or cyclohexyl ring; comprising reacting a compound of formula (II) with sulfuryl diamide, at an elevated temperature, in the presence of from 0 to about 10% water, to yield the corresponding compound of formula (I).