Process for dehydrogenation of sterols to produce delta 4-3-keto

Details Process for dehydrogenation of sterols to produce delta 4-3-keto Process for dehydrogenation of sterols to produce delta 4-3-keto

1979-10-04

1980-11-25

Roberts, Elbert L.

Chemistry of carbon compounds

Miscellaneous organic carbon compounds

C-metal

2603973, C07J 900

Patent

active

042357918

ABSTRACT:
This invention relates to the dehydrogenation of a 3-.beta.-hydroxy steroid or a mixture of soy sterols to form the corresponding mixture of .DELTA..sup.4 -3-keto derivatives of phytosterols, the improvement which comprises dehydrogenating the steroid or mixture of sterols using an activated non-pyrophoric nickel catalyst and carrying out the oxidation in the presence of a diaryl ketone. One such process uses a non-pyrophoric Raney nickel type catalyst and a diaryl ketone, such as benzophenone as a hydrogen acceptor.

REFERENCES:
patent: 4072697 (1978-02-01), Sekine et al.
patent: 4148810 (1979-04-01), Struve

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