反应详情

2-Bromo-5-(2-trimethylsilanyl-ethoxymethyl)-5H-pyrrolo[2,3-b]pyrazine (402 mg, 1.22 mmol) and 3-cyclohexyl-1-propyne (745 mg, 6.1 mmol) were reacted under the same conditions as described in example 4 above. The crude product was adsorbed onto silica (1.5 g) and purified by silica gel chromatography, eluting with 5% to 20% ethyl acetate in hexanes to afford 395 mg of 2-(3-cyclohexyl-prop-1-ynyl)-5-(2-trimethylsilanyl-ethoxymethyl)-5H-pyrrolo[2,3-b]pyrazin as a light brown semi-mobile oil. MS (M+H)+=370.

1. custompurified by silica gel chromatography
2. washeluting with 5% to 20% ethyl acetate in hexanes