Triethylamine → 5-acetylamino-7-[(7S)-7-tert-butoxycarbonylamino-5-azaspiro[2.4]hept-5-yl]-1-cyclopropyl-6-fluoro-1,4-dihydro-8-methyl-4-oxoquinoline-3-carboxylic acid

Participants

Reaction Conditions

Reaction Steps

A mixture consisting of 5-acetylamino-1-cyclopropyl-6,7-difluoro-1,4-dihydro-8-methyl-4-oxoquinoline-3-carboxylic acid (2.60 g, 7.75 mmol), (7S)-7-tert-butoxycarbonylamino-5-azaspiro[2.4]heptane (2.46 g, 11.6 mmol), triethylamine (1.62 ml, 11.7 mmol) and dimethyl sulfoxide (13 ml) was heated at an outer temperature of 80° C. for 7 hours under a condition of 2.94×108 Pa. When analysis was carried out by a high performance liquid chromatography after completion of the reaction, formed ratio of the compound of interest 5-acetylamino-7-[(7S)-7-tert-butoxycarbonylamino-5-azaspiro[2.4]hept-5-yl]-1-cyclopropyl-6-fluoro-1,4-dihydro-8-methyl-4-oxoquinoline-3-carboxylic acid was 77%. Also, residual ratio of the starting material was 10%.

Provenance & Evidence