| 摘要 |
PCT No. PCT/EP96/04880 Sec. 371 Date Apr. 1, 1998 Sec. 102(e) Date Apr. 1, 1998 PCT Filed Nov. 6, 1996 PCT Pub. No. WO97/17352 PCT Pub. Date May 15, 1997An efficient process for de-esterification has been provided for by application of special tetrahalogenides. By applying this process a new compound, viz. cefesone, and especially the E-isomer thereof, has been prepared. |
