Add time:09/10/2019         Source:sciencedirect.com

Treatment of diols, 11,12-seco-12-nor-11,13-dihydroxy-3-methoxy-17-vinylestra-1,3,5(10)-triene and the 18-fluoro-substituted derivatives, with phosphorus oxychloride led after rearrangement to (±)-B(9a)-homo-C-nor-3-methoxy-12-oxa-17-vinylestra-1,3,5(10)-triene and the 18-fluoro-substituted derivatives or (±)-11-nor-9-(2-propyl)-3-methoxy-12-oxa-17-vinylestra-1,3,5(10)-triene and the 18-fluoro-substituted derivatives. The vinyl group of the rearranged steroids has been oxidized using the Wacker process to the corresponding aldehydes.

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