Convenient preparation of A-ring fused pyridines from steroidal enamides
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Add time:09/06/2019 Source:sciencedirect.com
A facile strategy for the preparation of A-ring fused pyridosteroids has been accomplished in high yields by the reaction of Vilsmeier reagent (chloromethyleneiminium salt) with steroidal A-ring enamides (2- and 3-ene) under thermal conditions. The structure of 6′-chloro-5α-cholest [3,2-b]pyridine was determined by X-ray analysis.
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