1-Ethoxyvinyl(tri-n-butyl)tin (0.47 mL, 1.4 mmol) was added to a mixture of 2-amino-6-chloro-N-(5-phenoxy-thiophen-2-ylmethyl)-nicotinamide (170 mg, 0.46 mmol) described in Preparation Example A+-11, tetrakis(triphenylphosphine)palladium(0) (54 mg, 0.046 mmol) and xylene (5 mL), and the solution was stirred for 2.5 hours at 130° C. After cooling, water and ethyl acetate were added to the reaction solution for extraction, and the solution was washed with brine. The solvent was evaporated in vacuo, then, the residue was purified by NH silica gel column chromatography (hexane:ethyl acetate=2:1), and the title compound (150 mg, 0.38 mmol, 82%) was obtained as a pale yellow solid.
