反应详情

A solution of 7-amino-3-(1H-1,2,3-triazol-5-yl)thiomethyl-3-cephem-4-carboxylic acid (1.57 g.) and trimethylsilylacetamide (4.6 g.) in ethyl acetate (20 ml.) and a mixture of 2-(2,3-dihydro-1,4-dithiin-5-yl)-2-methoxyiminoacetic acid (syn isomer, 1.1 g.), N,N-dimethylformamide (0.44 g.) and phosphoryl chloride (0.92 g.) were treated in a similar manner to that of Example 21 to give 7-[2-(2,3-dihydro-1,4-dithiin-5-yl)-2-methoxyiminoacetamido]-3-(1H-1,2,3-triazol-5-yl)thiomethyl-3-cephem-4-carboxylic acid (syn isomer, 1.85 g.).

1. additionwere treated in a similar manner to that of Example 21