发明授权
US5225335A 1,2-dehydrogenation of steroidal 21-esters with Arthrobacter simplex or Bacterium cyclooxydans 失效
使用单节节杆菌或环孢菌素的甾体21-酯的1,2-脱氢

1,2-dehydrogenation of steroidal 21-esters with Arthrobacter simplex or
Bacterium cyclooxydans
摘要:
The present invention involves processes for 1,2-dehydrogenation of .DELTA..sup.4 -3-keto C.sub.21 -hemiester steroids of formula (I) ##STR1## with Arthrobacter simplex or Bacterium cyclooxydans to produce the corresponding .DELTA..sup.1,4 -3-keto C.sub.21 hemiester of formula (II) ##STR2## or free alcohol thereof with improved yields. The advantage is that the processes utilize higher substrate concentrations and give shorter reaction times than previously were known.
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