Novel estrogenic 17.alpha.-hydroxy-1,3,5(10),15-estratetraenes of the formula ##STR1## wherein R.sub.1 is H, lower alkyl or lower acyl, R.sub.2 is lower alkyl and R.sub.3 is H, lower alkyl, lower acyl or tetrahydropyranyloxy, are produced by (a) reacting a 16.alpha.,17.alpha.-epoxy-estratriene with lithium halide or HCl in glacial acetic acid; converting the resulting halohydrin into a 16-halo-17-tetrahydropyranyl ether; and splitting off hydrogen halide from therefrom; or (b) reacting the 16.alpha.,17.alpha.-epoxy-estratriene with diphenylselenide and alkali metal borohydride; oxidizing the thus-produced 17.alpha.-hydroxy-16.beta.-phenylselenide to the corresponding phenylselenide oxide; and forming the .DELTA..sup.15 double bond by heating with removal of phenyl--Se--OH.
该专利描述了一种新的
雌激素17.alpha.-羟基-1,3,5(10),15-麦角甾四烯的制备方法。其中,R.sub.1为氢、低碳基或低酰基,R.sub.2为低碳基,R.sub.3为氢、低碳基、低酰基或
四氢吡喃氧基。制备方法包括:(a)将16.alpha.,17.alpha.-环氧-麦角甾
三烯与
溴化锂或HCl在
冰乙酸中反应,将生成的卤代醇转化为16-卤代-17-
四氢吡喃基醚,并从中分离氢卤酸;或(b)将16.alpha.,17.alpha.-环氧-麦角甾
三烯与二苯基
硒和碱性
金属
硼氢化物反应,将产生的17.alpha.-羟基-16.beTA.-苯基
硒化物氧化为相应的苯基
硒氧化物,并通过加热去除苯基--Se--OH形成.DELTA..sup.15双键。