Abstract
The Reformatsky reaction 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 Reformatsky reactions of 3- and 16-keto-steroids and also of 17-keto-steroids and ethyl monobromoacetate.
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