Acetone → 2-phenyl-1-[2-(3,4,5-trimethoxy-phenyl]-5H-pyrrolo[2,3-b]pyrazin-7-yl]-ethanone

Participants

Reaction Conditions

Reaction Steps

7-Phenylethynyl-2-(3,4,5-trimethoxy-phenyl)-5H-pyrrolo[2,3-b]pyrazine (405 mg, 1.05 mmol) and p-toluenesulfonic acid monohydrate (40 mg, 0.21 mmol) were placed in a 20 ml microwave vial with 14 ml of a 2:1 mixture of methanol and acetone. The reaction was heated in a microwave reactor at 100° C. for 1.5 hours. The reaction was diluted with ethyl acetate, washed two times with saturated sodium bicarbonate and water, dried and concentrated. The residue was triturated with ethyl acetate and hexanes, filtered, and dried to yield 175 mg of 2-phenyl-1-[2-(3,4,5-trimethoxy-phenyl]-5H-pyrrolo[2,3-b]pyrazin-7-yl]-ethanone. MS: (M+H)+=404. MP=226.0-227.0° C.

Provenance & Evidence