Synthesis of new nitro and amino sterols; potential inhibitors of 4-methyl sterol oxidase
作者:I. Victor Ekhato、Cecil H. Robinson
DOI:10.1039/p19880003239
日期:——
New 4-nitro and 4-amino 5α-steroids were made regioselectively from cholesterol via nitration of 3-acetoxy-5α-cholesta-l,3-diene (2). Nitration of enol acetate (2) gave 4α-nitro-5α-cholest-1-en-3-one (3), which was catalytically reduced to 4α-nitro-5α-cholestan-3-one (4). Sodium borohydride reduction of (4) gave 4α-nitro-5α-cholestan-3β-ol (5). Reduction of 4α-nitro-5α-cholestan-3β-ol with lithium
EKHATO, I. VICTOR;ROBINSON, CECIL H., J. CHEM. SOC. PERKIN TRANS. PT 1,(1988) N2, C. 3239-3242
作者:EKHATO, I. VICTOR、ROBINSON, CECIL H.
DOI:——
日期:——
The Photochemistry of Steroidal 6-Membered Cyclic α-Nitro Enones
作者:Hiroshi Suginome、Yoshitaka Kurokawa
DOI:10.1246/bcsj.62.1343
日期:1989.4.15
The products of the photolysis of two steroidal cyclic α-nitro enones, newly synthesized, were compared with those of the cyclic α-nitro ketones and cyclic enones. Direct irradiation of 2α-nitrocholest-4-en-3-one in protic solvents resulted in an unexpected α-cleavage of the carbonyl group and gave 3-alkoxy-2-nitro-2,3-secocholest-4-en-3-one while irradiation of 4α-nitro-5α-cholest-1-en-3-one gave the parent cholest-1-en-3-one which arose from the removal of the nitro group.