Patent ID: 7868174

Claim:
A process for the preparation of a compound of Formula (I) wherein R is selected from hydrogen, halogen, alkyl, cycloalkyl, aryl, heteroaryl, OR′, SR′, S(O)R′, SO 2 R′, SO 3 R′, CO 2 R′, C(O)SR′, and CN; and R′ is selected from a negative charge, hydrogen, alkyl, cycloalkyl, or aryl, the process comprising (a) contacting, in an organic solvent, a compound having the formula [RuX 2 (η 6 -arene)] 2 wherein X is a halide; and η 6 -arene is chosen from benzene, p-cymene, mesitylene, 1,3,5-triethylbenzene and hexamethylbenzene; with a compound of formula (7): wherein R 1 and R 2 independently represent an aryl or cycloalkyl group, or optionally, R 1 and R 2 may together form a cycloalkyl ring; R 3 and R 4 independently represent hydrogen or a negative charge; R 5 and R 6 independently represent hydrogen, alkyl, cycloalkyl, or aryl, or optionally R 5 and R 6 together form an optionally substituted nitrogen-containing ring; and (b) contacting the product of step (a) with a compound of Formula (II) in the presence of a hydrogen source: