The reformatsky reaction of 17-keto-steroids with ethyl α-bromopropionate
作者:Iwasaki Mitsutaka
DOI:10.1016/0039-128x(67)90025-6
日期:1967.4
Abstract The Reformatskyreaction of 17-keto-steroids with ethyl α-bromopropionate was investigated, and a new decarboxylation reaction of 23-nor-cholan-22-oic acids has been discovered, leading to pregn-17(20)-enes. Such a decarboxylation, however, could not be achieved with those acids prepared by the Reformatskyreactions of 3- and 16-keto-steroids and also of 17-keto-steroids and ethyl monobromoacetate
In order to achieve the desired separation of cholesterol-lowering and estrogenic effect, some A-ring aromatic 16-keto steroids were synthesised. All of these compounds lacked estrogenic effect and their lipid-shifting activities were also weak.
为了实现降低胆固醇和雌激素作用的理想分离,合成了一些 A 环芳香族 16 酮类固醇。所有这些化合物都缺乏雌激素作用,它们的脂质转移活性也很弱。