Browsing Kimya / Chemistry by Author "Yıldırım, Kudret"

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The biotransformation of 5ß-methyl-19-norpregn-9-enes by Cephalosporium aphidicola

Yıldırım, Kudret (2004)

The biotransformation of 3β-hydroxy-5β-methyl-19-norpregn-9-en-20-one and the corresponding 3,20-dione by Cephalosporium aphidicola has been shown to give 10β-hydroxy-5β-methyl-19-norpregn-9(11)-ene-3,20-dione and related ...
The biotransformation of some steroids by Aspergillus sydowii MRC 200653

Yıldırım, Kudret; Kuru, Ali (SAGE PUBLICATIONS LTD, 2016)

The incubation of testosterone, dehydroepiandrosterone, progesterone and pregnenolone with Aspergillus sydowii MRC 200653 is reported. Testosterone was mainly hydroxylated at C-6 beta and to a minor extent at C-14 alpha ...
The stereochemistry of epoxidation of 5 beta-methyl-19-norsteroidal 9,10-alkenes

Yıldırım, Kudret (SCIENCE REVIEWS LTD, 2005)

Crystallographic studies have shown that the oxidation of 3 beta,6 beta-dihydroxy-5 beta-methyl-19-norsteroidal 9(10)-alkenes with chromium trioxide leads to 9 alpha,10 alpha-epoxides as minor products.