A new method for the conversion of aldehydes to methyl esters using pyridinium dichromate and methanol in dimethylformamide.
作者:Brian O'Connor、George Just
DOI:10.1016/s0040-4039(00)95480-7
日期:1987.1
A newmethod for the conversion of aldehydes to methyl esters using pyridinium dichromate and methanol in DMF is described.
描述了使用重铬酸吡啶鎓和甲醇在DMF中将醛转化为甲酯的新方法。
US4088760A
申请人:——
公开号:US4088760A
公开(公告)日:1978-05-09
Testosterone 5.alpha.-reductase inhibitors
申请人:Richardson-Merrell Inc.
公开号:US04088760A1
公开(公告)日:1978-05-09
Compounds of the following general formula are testosterone 5.alpha.-reductase inhibitors rendering said compounds useful in the treatment of acne and oily skin: ##STR1## wherein n is an integer of from 0 to 4; R.sub.1 is --COOR.sub.2, --CONR.sub.3 R.sub.4, --CHO or --CH.sub.2 OR.sub.5 ; R.sub.2 is hydrogen, a straight or branched lower alkyl group of from 1 to 4 carbon atoms, or benzyl; each of R.sub.3 and R.sub.4 is hydrogen or a straight or branched lower alkyl group of from 1 to 4 carbon atoms; and R.sub.5 is hydrogen, alkylcarbonyl wherein the alkyl moiety has from 1 to 20 carbon atoms and is straight or branched, benzoyl, phenylalkylcarbonyl wherein the alkyl moiety has from 1 to 6 carbon atoms and is straight or branched, or cycloalkylcarbonyl wherein the cycloalkyl moiety has from 5 to 10 carbon atoms.