Use of chiral rhodium-diphosphine catalyst capable of catalytic

Details Use of chiral rhodium-diphosphine catalyst capable of catalytic Use of chiral rhodium-diphosphine catalyst capable of catalytic

1979-02-06

1980-08-05

Trousof, Natalie

Organic compounds -- part of the class 532-570 series

Organic compounds

Heterocyclic carbon compounds containing a hetero ring...

C07D23338

Patent

active

042163315

ABSTRACT:
A soluble, chiral, rhodium-containing catalyst which permits the catalytic reduction of prochiral 3-acyl-1-2-alkoxyethyl)-4-phenyl-2-imidazolinones to chiral 3-acylimidazolidinones with a substantial excess of the desired S optical isomer. The 3-acylimidazolidinones may in turn be substantially converted to levamisole, the S isomer of tetramisole. The resolution of tetramisole to remove the R isomer is thus avoided.

REFERENCES:
patent: 4087611 (1978-05-01), Raghu et al.
patent: 4090025 (1978-05-01), Raghu et al.
patent: 4139707 (1979-02-01), Raghu et al.
patent: 4166824 (1979-09-01), Henderson, Jr.

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