Highly efficient epoxidation of unsaturated steroids using magnesium bis(monoperoxyphthalate) hexahydrate
作者:João F.S. Carvalho、M. Manuel Cruz Silva、M. Luisa Sá e Melo
DOI:10.1016/j.tet.2009.01.100
日期:2009.4
Fast generation of epoxides from the corresponding homoallylic and allylic steroidal olefins was developed by using magnesium bis(monoperoxyphthalate) hexahydrate (MMPP) as oxidant suspended in acetonitrile (CH3CN) at reflux temperature. The protocol involves the use of a safe readily available oxidant along with an easy work-up, which renders the process very efficient. Selective 4,5- and 5,6-epoxidations
Chemoselective epoxidation of cholesterol derivatives on a surface-designed molecularly imprinted Ru–porphyrin catalyst
作者:Satoshi Muratsugu、Hiroshi Baba、Tatsuya Tanimoto、Kana Sawaguchi、Satoru Ikemoto、Masahiro Tasaki、Yosuke Terao、Mizuki Tada
DOI:10.1039/c8cc00896e
日期:——
High chemoselectivity for the C5C6epoxidation of cholesterol derivatives without protecting other oxidizable functional groups was achieved on a newly designed molecularly imprinted Ru–porphyrin catalyst using a SiO2-support.
AMINO DERIVATIVES OF ANDROSTANES AND ANDROSTENES AS MEDICAMENTS FOR CARDIOVASCULAR DISORDERS
申请人:Cerri Alberto
公开号:US20110053902A1
公开(公告)日:2011-03-03
Compounds of formula (I) wherein: the groups are as defined in the description, are useful for the preparation of medicaments for the treatment of cardiovascular disorders, in particular heart failure and hypertension. The compounds are inhibitors of the enzymatic activity of the Na
+
, K
+
-ATPase. Said compounds are used for the preparation of a medicament for the treatment of a disease caused by the hypertensive effects of endogenous ouabain, such as renal failure progression in autosomal dominant polycystic renal disease (ADPKD), preeclamptic hypertension and proteinuria and renal failure progression in patients with adducin polymorphisms.
The preparation and dienone–phenol rearrangement of androsta-2,5-diene-4,17-dione
作者:James R. Hanson、David Raines、Steve G. Knights
DOI:10.1039/p19800001311
日期:——
The preparation of androsta-2,5-diene-4,17-dione from dehydroisoandrosterone is described. Its dienone–phenolrearrangement, in the presence of hydrobromic acid and glacial acetic acid, affords 1-methyl-4-hydroxyestra-1,3,5(10)-trin-17-one.
Microbiological Hydroxylation of Some Epoxy Steroids by the Fungus <i>Mucor Plumbeus</i>
作者:Khalid O. Alfooty
DOI:10.3184/030823408x320665
日期:2008.6
preparation of epoxy steroids derived from testosterone, dehydroisoandrosterone and epiandrosterone using m-chloroperbenzoic acid and their biotransformation by the fungus Mucorplumbeus is described. The results reveal an effect of the epoxide on the biotransformation.