15β-hydroxysteroids (part VII). Steroids of the human perinatal period: The synthesis of steroid markers and their radioactive tracers
作者:Anthony Y. Reeder、George E. Joannou
DOI:10.1016/s0039-128x(96)00204-8
日期:1997.2
We report the synthesis of 10 novel steroids obtained from 3 beta,15 beta-diacetoxy-17 alpha-hydroxy-5-pregnen-20-one (1c) as intermediates in the synthesis of 15 beta-acetoxy-2,20-ethylenedioxy-17 alpha-hydroxy-4-pregnen-3-one (6a) and its tritiated tracer 15 beta-acetoxy-20,20-ethylenedioxy-17 alpha-hydroxy-1,2,6,7-H-3-pregn-4-en-3-one (6d). The one pot interconversion of intermediate (6a) to 3 beta,15 beta,17 alpha-trihydroxy-5-pregnen-20-one (1a) and 3 alpha,15 beta,17 alpha-trihydroxy-5 beta-pregnan-20-one (2a) provides a new and efficient approach to the synthesis of diagnostically important metabolites of the human neonate and a possible route in the synthesis of the tritated tracers 3 beta,15 beta,17 alpha-trihydroxy-1,2,7-H-3-pregn-5-en-20-one (1d) and 3 alpha,15 beta,17 alpha-trihydroxy-1,2,6,7-H-3-5 beta-pregnan-20-one (2b) for the development of new immunoassays. We also report in this investigation an alternative route in the synthesis of 15 beta,17 alpha-dihydroxy-4-pregnen-3,20-dione (7a) an intermediate in the synthesis of human 15 beta-hydroxysteroid metabolites. (C) 1997 by Elsevier Science Inc.