Halogenation using halo-vilsmeier reagent

Details Halogenation using halo-vilsmeier reagent Halogenation using halo-vilsmeier reagent

C - Chemistry, Metallurgy

07

J

C07J 41/00 (2006.01) C07B 39/00 (2006.01) C07J 3/00 (2006.01) C07J 9/00 (2006.01) C07J 43/00 (2006.01)

Patent

CA 2127272

2127272 9314106 PCTABS00024 The invention provides an improved process for the preparation of a halogenated steroidal diene. The process involves the simultaneous transformation of the steroidal 3-one to 3-halo and 17-carboxylic acid to 17-carboxamide in a single reaction without the isolation of an intermediate. The process takes place by reacting the steroidal starting material with a halogen-Vilsmeier reagent.

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