Dehydrogenation process

Details Dehydrogenation process Dehydrogenation process

C - Chemistry, Metallurgy

07

J

260/3, 260/7.1

C07J 73/00 (2006.01) C07J 75/00 (2006.01)

Patent

CA 1331601

(1) ABSTRACT OF THE INVENTION A process for dehydrogenating a compound of the formula Image (I) (2) - 1 - Image (II) (III) which comprises reacting the compound with a silylating agent in the presence of a quinone to introduce a.DELTA.1 double bond. Novel intermediates are compounds of the formula (3) - i - Image (I) wherein: Q is absent or is Image or Image or or -OH -OH where R4 is methyl, C1-8 straight or branched chain alkyl, C3-6 cycloalkyl, phenyl, or combinations thereof; and R14 is hydrogen, C1-6 alkyl, C1-6 straight or branched chain alkoxy, halo, nitro or cyano.

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