2-Cyano-N,N-dimethylacetamide → N-tert-butyl-2-(4-(2-cyano-3-(dimethylamino)-3-oxoprop-1-enyl)phenylamino)-5-((2-(trimethylsilyl)ethoxy)methyl)-5H-pyrrolo[2,3-b]pyrazine-7-carboxamide

関与物質

反応手順

To a 25 ml three necked round bottom flask, N-tert-butyl-2-(4-formylphenylamino)-5-((2-(trimethylsilyl)ethoxy)methyl)-5H-pyrrolo[2,3-b]pyrazine-7-carboxamide (0.022 g, 0.000047 mol) and 2-cyano-N,N-dimethylacetamide (0.021 g, 0.000187 mol) was taken in ethanol (2 ml). Piperidine acetate (3.3 M solution in water) (0.2 ml) was added dropwise at RT. After completion of the addition, reaction mixture was refluxed overnight. After completion of the reaction, the ethanol was distilled out and water was added to the residue. Aqueous was extracted with ethyl acetate, organic layers were combined, dried over Na2SO4, filtered and concentrated to afford crude product which was purified by triturated with n-pentane. The solid was filtered and dried under vacuum to yield 0.015 g of N-tert-butyl-2-(4-(2-cyano-3-(dimethylamino)-3-oxoprop-1-enyl)phenylamino)-5-((2-(trimethylsilyl)ethoxy)-methyl)-5H-pyrrolo[2,3-b]pyrazine-7-carboxamide.

情報源と証拠