Chemistry: molecular biology and microbiology – Micro-organism – tissue cell culture or enzyme using process... – Preparing compound containing a...
Patent
1982-09-24
1985-07-09
Tanenholtz, Alvin E.
Chemistry: molecular biology and microbiology
Micro-organism, tissue cell culture or enzyme using process...
Preparing compound containing a...
435 52, 435 53, 435 54, 435 56, 435 57, 435 58, 435 59, 435 60, 435 61, 435 62, C12P 3316, C12P 3300, C12P 3320, C12P 3312, C12P 3318, C12P 3314, C12P 3306, C12P 3308, C12P 3310, C12P 3302, C12P 3304
Patent
active
045282714
ABSTRACT:
Microbiological conversions of cyclodextrins are intensified by adding to the reaction mixture 0.2 to 3 moles of .alpha.-, .beta.- or .gamma.-cyclodextrin or an optical mixture thereof pro mole of the steroid substrate, before, at the beginning or during the conversion. The cyclodextrin if desired, can be removed after the reaction. In this way the reaction velocity can be increased, the reaction time is reduced, the substrate concentration in the solution, i.e. its solubility is increased or the so called product inhibition may be avoided. In certain cases of more alternatives the desired reaction can be catalyzed and in this manner the selectivity is increased.
REFERENCES:
patent: 3639212 (1972-02-01), Shirasaka et al.
patent: 4057469 (1977-11-01), Nishikawa et al.
patent: 4397946 (1983-08-01), Imada et al.
Applied Microbiology, 1972, 23(1), 72-77.
Helv. Chim. Acts., 1954, 37, 1548-15553.
Balazs nee Czurda Marta
Bartho Istvan
Habon Ilona
Hantos Gabor
Stadler nee Szoke Agnes
Chinoin Gyogyszer- es Vegyeszeti Termekek Gyara RT.
Dubno Herbert
Richter Gedeon Vegyeszeti Gyar Rt.
Ross Karl F.
Tanenholtz Alvin E.
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