Organic compounds -- part of the class 532-570 series – Organic compounds – Heterocyclic carbon compounds containing a hetero ring...
Patent
1977-08-05
1978-12-19
Trousof, Natalie
Organic compounds -- part of the class 532-570 series
Organic compounds
Heterocyclic carbon compounds containing a hetero ring...
260307FA, 2603322A, 560153, 562557, 562426, C07D49504
Patent
active
041307135
ABSTRACT:
A novel procedure for the preparation of biotin employing cysteine as the starting material is disclosed. This synthesis involves the formation of the thiophane ring by a 1,3-dipolar addition. By virtue of this process pure d-biotin can be obtained, thus obviating the need for chemical resolution. Novel intermediates are also disclosed.
REFERENCES:
patent: 2489237 (1949-11-01), Goldberg et al.
patent: 3740416 (1973-06-01), Gerecke et al.
Baggiolini Enrico G.
Lee Hsi L.
Uskokovic Milan R.
Harkaway N.
Hoffmann-La Roche Inc.
Johnston George W.
Leon Bernard S.
Saxe Jon S.
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