反应详情

To cold, concentrated hydrochloric acid (200 ml) was added, in the following order, 100 g of stannous chloride dihydrate, 200 ml of tetrahydrofuran, and a solution of 28 g of 1-[N-methyl-N-(3-nitro-4-pyridinyl)amino]pyrrole-2-carboxaldehyde in 150 ml of tetrahydrofuran. Upon completion of the 1-[N-methyl-N-(3-nitro-4-pyridinyl)amino]pyrrole-2-carboxaldehyde addition, the reaction was poured into an aqueous solution of sodium hydroxide (200 g in 1 liter of water), stirred for five minutes, and then extracted with ethyl acetate. The organic layer was washed with water followed by a saturated sodium chloride solution, dried over anhydrous magnesium sulfate, filtered, and concentrated. The resultant oil was purified by means of high pressure liquid chromatography (silica gel; elution with ethyl acetate) to afford 10 g (38%) of 5-methyl-5H-pyrido[3,4-f]pyrrolo[1,2-b][1,2,5]triazepine as an oil, IR(CHCl3) C=N @ 1610 cm-1 ; MS(EI)M+ @ 199 (100%).

1. extractionextracted with ethyl acetate
2. washThe organic layer was washed with water
3. dry with materialdried over anhydrous magnesium sulfate
4. filtrationfiltered
5. concentrationconcentrated
6. customThe resultant oil was purified by means of high pressure liquid chromatography (silica gel; elution with ethyl acetate)