Starting from estrone 3-benzyloxy-17β-hydroxyestra-1,3,5(10)-trien-16-one oxime (3b) was synthesized, which underwent Beckmann fragmentation giving the 3-benzyloxy-17-oxo- 16,17-secoestra-1,3,5(10)-triene-16-nitrile (4b). Sodium borohydride reduction of this compound afforded 3-benzyloxy-17-hydroxy-16,17-secoestra-1,3,5(10)-triene-16-nitrile (5b). The deprotection of the 3-hydroxy group was achieved by action of hydrogen upon derivatives4band5bin presence of Pd/C as a catalyst, yielding 3-hydroxy-17-oxo-16,17-secoestra- 1,3,5(10)-triene-16-nitrile (4a) and 3,17-dihydroxy-16,17-secoestra-1,3,5(10)-triene-16-nitrile (5a). In biological tests on experimental animals, compounds4a,4b,5aand5bshowed virtually a complete loss of estrogenic activity, whereas compounds4a,5aand5bexhibited moderate antiestrogenic effect.
从酮醇3-苄氧基-17β-羟基
雌甾-1,3,5(10)-
三烯-16-酮氧
肟(
3b)出发合成了,经过贝克曼断裂得到3-苄氧基-17-酮基-16,17-
戊二酸雌甾-1,3,5(10)-
三烯-16-腈(
4b)。对该化合物进行
硼氢化钠还原得到3-苄氧基-17-羟基-16,17-
戊二酸雌甾-1,3,5(10)-
三烯-16-腈(
5b)。通过在Pd/C存在下作用
氢气对衍
生物4b和
5b进行脱保护,得到3-羟基-17-酮基-16,17-
戊二酸雌甾-1,3,5(10)-
三烯-16-腈(
4a)和3,17-二羟基-16,17-
戊二酸雌甾-1,3,5(10)-
三烯-16-腈(
5a)。在实验动物的
生物学测试中,化合物
4a、
4b、
5a和
5b几乎完全失去
雌激素活性,而化合物
4a、
5a和
5b表现出中等的抗
雌激素作用。