反应详情

Japanese Patent Application Laid-open No. 54580/1976 discloses a prior art preparation process of a compound represented by the general formula (I) by reacting its corresponding phenylglycine derivative with 7-aminocephem derivative. According to the above prior art process, N-t-butoxycarbonyl-p-hydroxyphenylglycine is reacted with 7-amino-3-(1-carboxymethyltetrazol-5-ylthiomethyl)-3-cephem-4-carboxylic acid and the protecting group is then removed from the resultant reaction product to give 7-(α-amino-4-hydroxyphenylacetamido)-3-(1-carboxymethyltetrazol-5-ylthiomethyl)-3-cephem-4-carboxylic acid. In other words, the p-hydroxyphenylglycine is caused to undergo a reaction after its amino group has been protected with a t-butoxycarbonyl group. According to the above known literature, the above prior art process provided an extremely low yield, i.e., a yield of as low as about 5%.

1. custom54580/1976 discloses a prior art preparation process of a compound
2. customthe protecting group is then removed from the resultant
3. customreaction product