| abstract |
DERIVATIVES OF HETEROCYCLIC ACETIC ACID REPRESENTED BY GENERAL FORMULA I BELOW: (CF DRAWING IN BOPI) OR Y AND Y TOGETHER FORM A DETACHABLE GROUP PROTECTING RADICAL CARBONYL AND X IS AN ESTERIFYING GROUP DETACHABLE SELECTIVELY SELECTIVELY, PREPARATION COMPOUND OF GENERAL FORMULA III BELOW: (CF DRAWING IN BOPI) OR X, R, Y AND Y ARE AS DEFINED ABOVE. THESE COMPOUNDS OF GENERAL FORMULA I CONSTITUTE INTERMEDIATE INTERESTS IN THE SYNTHESIS OF THIENAMYCIN AND ITS ANALOGUES. |