Chemoselective hydrogenation of 17α-hydroxy-6-methylen-pregna-4,9(11)-diene-3,20-dione. Synthesis of fluorometholone
摘要:
The development of an efficient hydrogenation method of 17 alpha-hydroxy-6-methylen-pregna-4,9(11)-diene-3,20-dione by using wet (10%) Pd on carbon and triethylamine led us to the corresponding 6 alpha-methyl-pregnane in good yield. This chemoselective process allowed us to set up a large-scale procedure for the synthesis of the ophthalmic drug fluorometholone with 45% overall yield. (C) 2009 Elsevier Ltd. All rights reserved.
Chemoselective hydrogenation of 17α-hydroxy-6-methylen-pregna-4,9(11)-diene-3,20-dione. Synthesis of fluorometholone
摘要:
The development of an efficient hydrogenation method of 17 alpha-hydroxy-6-methylen-pregna-4,9(11)-diene-3,20-dione by using wet (10%) Pd on carbon and triethylamine led us to the corresponding 6 alpha-methyl-pregnane in good yield. This chemoselective process allowed us to set up a large-scale procedure for the synthesis of the ophthalmic drug fluorometholone with 45% overall yield. (C) 2009 Elsevier Ltd. All rights reserved.
Process for obtaining fluorometholone and intermediates therefor
申请人:Crystal Pharma, S.L.U.
公开号:EP2246359A1
公开(公告)日:2010-11-03
The present invention relates to a process for obtaining compounds of formula (I) and (V), intermediates useful in the synthesis of some steroids, for example, fluorometholone and derivatives thereof. The invention also relates to other intermediates useful in synthesis.