摘要:
The invention concerns novel yeast strains, methods and genetic constructs for preparing them, and their use for synthesising or modifying steroid compounds. More particularly, the invention concerns strains having reduced 20α-HSD activity, in particular by modification of the GCY1 and/or YPR1 genes. The inventive yeast strains enable to improve the efficacy of synthesis or to increase selectivity or yields of the process, as well as the quality of the final product. The inventive strains, methods and compounds are useful for researching, developing and producing products with therapeutic or prophylactic activity, in a human or an animal, in particular steroid derivatives.
摘要:
The present invention relates to a microbiological process for the transformation of 17β-substituted 4-azaandrostan-3-ones and the use of the biotransformation products as inhibitors of the enzyme 5α-reductase.
摘要:
The present invention relates to a microbiological process for the transformation of 17β-substituted 4-azaandrostan-3-ones and the use of the biotransformation products as inhibitors of the enzyme 5α-reductase.
摘要:
Compounds of formula (I), wherein X represents =O or H(alpha)OR(beta), Y represents H2 or OH(alpha)H(beta), Z represents H or OH(alpha), and R represents H, COCH3, COCH2CH3, COCH(CH3)2 or COC(CH3)3, which are prepared by bringing androst-4-ene-3,17-dione into contact with microorganisms belonging to the genus Acremonium. These compounds are effective in inhibiting estrogen synthetase of human placenta origin.
摘要:
7β-hydroxy-4-pregnene-3,20-dione derivatives are prepared by use of Acremonium sp. The group of these compounds has possibility of being utilized as an intermediate for the synthesis of progesterone derivatives having ovulation-inhibiting activity. These compounds themselves have also cell differentiaition activity for Ml cells.