作者: C. H. Meystre , K. Heusler , J. Kalvoda , P. Wieland , G. Anner
关键词: Reagent 、 Silver acetate 、 Iodine 、 Substitution reaction 、 Primary reaction 、 Oxy radicals 、 Chemistry 、 Organic chemistry 、 Medicinal chemistry 、 Yield (chemistry)
摘要: The reactions of 20-hydroxypregnanes with iodine and lead tetraacetate, mercuric or silver acetate yield the corresponding oxy radicals. With latter two reagents, 20-hypoiodites are definitely intermediates. primary reaction products, i.e. 18-iodo-20-hydroxy compounds, can be oxidized hydrolized to 18-hydroxy-20-oxo-pregnanes. Under suitable conditions, especially tetraacetate iodine, a second substitution on carbon 18 18-iodo-20-hydroxy-pregnanes takes place, leading compounds (18 20)-hemiacetal type. These 20)-lactones.