Organic compounds -- part of the class 532-570 series – Organic compounds – Heterocyclic carbon compounds containing a hetero ring...
Patent
1982-05-17
1984-08-28
Gerstl, Robert
Organic compounds -- part of the class 532-570 series
Organic compounds
Heterocyclic carbon compounds containing a hetero ring...
548147, 548303, 548321, C07D51304
Patent
active
044685165
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: 2489235 (1949-11-01), Goldberg et al.
patent: 2489236 (1949-11-01), Goldberg et al.
patent: 4029647 (1977-06-01), Confalone et al.
patent: 4124595 (1978-11-01), Confalone et al.
Gerstl Robert
Holtrust G.
Knuth C. J.
Pfizer Inc.
Richardson P. C.
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