发明授权
US5157135A 1.alpha.,25-dihydroxyvitamin D4 compounds, ergosta-5,7-diene compounds and processes for the preparation thereof 失效
1(ALPHA),25-二羟基维生素D4化合物,ERGOSTA-5,7-二烯化合物及其制备方法

1.alpha.,25-dihydroxyvitamin D4 compounds, ergosta-5,7-diene compounds
and processes for the preparation thereof
摘要:
(24S)- and (24R)-1.alpha.,25-Dihydroxyvitamin D.sub.4 compounds and processes for preparing same. Ergosta-5,7-diene compounds which are useful intermediates in the synthesis of the 1.alpha.,25-dihydroxyvitamin D.sub.4 compounds. The D.sub.4 compounds are expected to possess an interesting pharmacological activity in association with the active-type vitamins D.sub.3 and D.sub.2.
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