tert-butyl N-(2-amino-2-phenylethyl)carbamate → (4-{3-[2-(2-Tert-butoxycarbonylamino-1-phenyl-ethylamino)-pyrimidin-4-yl]-imidazo[1,2-a]pyrazin-8-ylamino}-cyclohexyl)-carbamic acid tert-butyl ester

Participants

Reaction Conditions

Reaction Steps

The mixture of {4-[3-(2-methanesulfinyl-pyrimidin-4-yl)-imidazo[1,2-a]pyrazin-8-ylamino]-cyclohexyl}-carbamic acid tert-butyl ester (from Example 48 supra) (170 mg, 0.36 mmol) and (2-amino-2-phenyl-ethyl)-carbamic acid tert-butyl ester (from Example 51 supra) (341 mg, 1.44 mmol) was heated at 140° C. with stirring for 2 hours. The oil was purified by chromatography (silica gel, 10 g, 200-300 mesh, eluting with dichloromethane:methanol, 50:1 to 30:1) to afford crude (4-{3-[2-(2-tert-butoxycarbonylamino-1-phenyl-ethylamino)-pyrimidin-4-yl]-imidazo[1,2-a]pyrazin-8-ylamino}-cyclohexyl)-carbamic acid tert-butyl ester. (Yield 100 mg). LC-MS: [M+H]+ 644.

Provenance & Evidence