abstract |
10B - METHYL-13B-ETHYLGON-4,9(11)-DIENES HAVING PROGESTATIONAL AND ANTIESTROGENIC ACTIVITY ARE PREPARED FROM 13B-ETHYLGON-4-ENES BY A SEQUENCE OF REACTIONS, INCLUDING OZONIZATION AT THE 4-POSITION UNSATURATION, INTRODUCTION OF UNSATURATION AT THE 9-POSITION, ADDITION OF A METHYL GROUP AT THE 10-POSITION, AND REFORMATION OF THE A-RING. |