Method for introducing a 1,2 double bond into azasteroids

Details Method for introducing a 1,2 double bond into azasteroids Method for introducing a 1,2 double bond into azasteroids

C - Chemistry, Metallurgy

07

J

260/4

C07J 73/00 (2006.01)

Patent

CA 2029859

A process for introducing a 1,2 double bond into a compound of the formula Image -i- which comprises the process of (a) treating the compound of formula I with oxalyl chloride; (b) brominating the product of step (a) followed by in situ dehydrobromination; (c) deprotecting the product of step (b) to yield the .alpha. and .beta. isomers; (d) dehydrobrominating the product of step (c), which results in the introduction of a double bond at the 1,2 position.

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