反应详情

7-[N2,N3-Bis(benzyloxycarbonyl)guanidino]-8-methylquinoline. To a pale yellow solution of 500 mg of 7-amino-8-methylquinoline in 20 mL of tetrahydrofuran are added 1.18 g of ethyl N,N-bis(benzyloxy-carbonyl)pseudothiourea and 1.01 g of mercuric acetate and the mixture is stirred at room temperature for 1 hour. The suspension is diluted with ethyl acetate and the organic layer is washed with water followed by brine. The aqueous layers are extracted with ethyl acetate; the combined organic layers are dried over magnesium sulfate, filtered and rotary evaporated. The residue is purified by flash column chromatography on silica gel, eluting with 50% ethyl acetate/hexanes and recrystallization from hexanes/methylene chloride to provide 1.257 g of 7-[N2,N3-bis(benzyloxycarbonyl)guanidino]-8-ethylquinoline as a white solid.

1. washthe organic layer is washed with water
2. extractionThe aqueous layers are extracted with ethyl acetate
3. dry with materialthe combined organic layers are dried over magnesium sulfate
4. filtrationfiltered
5. customThe residue is purified by flash column chromatography on silica gel
6. washeluting with 50% ethyl acetate/hexanes and recrystallization from hexanes/methylene chloride