Imidazolidinone precursors for the preparation of biotin

Details Imidazolidinone precursors for the preparation of biotin Imidazolidinone precursors for the preparation of biotin

1986-09-22

1987-09-15

Schwartz, Richard A.

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

Organic compounds

Heterocyclic carbon compounds containing a hetero ring...

C07D23334

Patent

active

046940871

ABSTRACT:
A novel process is described for preparation of biotin comprising preparation of substituted 3H, 5H-imidazo[1,5c]tetrahydro thiazoles by contacting the boron trifluoride adduct of an appropriate thiazoline with the metallic derivative of an ester enolate, reducing the ester, hydrolyzing the thiazolidine moiety and hydrolyzing or oxidizing the resultant compound. Intermediates obtained in the preparation of biotin by the above process and alternate procedures for preparing said intermediates are also presented. A novel process for preparation of d-biotin is also given.

REFERENCES:
patent: 2489232 (1949-11-01), Goldberg et al.
patent: 3960884 (1976-06-01), Zavyalov et al.

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