| abstract |
The present invention provides a doripenem intermediate compound shown by formula (XIV), wherein PNB is p-nitrobenzyl, and HX is an acid; and when HX is a monobasic acid, n=1; and when HX is a polybasic acid, n=2. The present invention also provides a process for preparing the doripenem intermediate compound (XIV). In addition, the present invention provides a process for preparing doripenem (I) from the doripenem intermediate compound (XIV) in a simple manner, with a high yield and low production costs. The new mono-protected doripenem intermediate compound provided in the present invention contains only one protecting group, reducing the difficulty and complexity in the subsequent de-protection step by catalytic hydrogenation, increasing the yield of the catalytic hydrogenation reaction, and thus reducing the production cost of the final product. The process is easy to operate and suitable for industrialized production. |