Introduction of fluorine in position 6 of derivatives of 17α-hydroxy-20-ketopregnanes. synthesis of 6α-fluorocortexolone
作者:M. I. Ryakhovskaya、E. V. Popova、L. M. Alekseeva、G. S. Grinenko
DOI:10.1007/bf00773082
日期:1992.6
develop a synthesis of 6-fluorinated cortexolones (synaflan, locacorten) based on androstenedione (AD), a product of microbial oxidation of sitosterol, we investigated the possibility of introducing fluorine at different stages of the synthesis: into the 3-ethylene ketal of 17~-hydroxyprogesterone (I) and esters of cortexolone (VIII, IX), the preparation of which from AD has been well studied [2, 4, 5]