The synthesis of 1,1-disubstituted tetrahydro-β-carbolines induced by iodine
作者:Y. Lingam、D. Muralimohan Rao、Dipal R. Bhowmik、Pachore Sharad Santu、K. Raghavendra Rao、Aminul Islam
DOI:10.1016/j.tetlet.2007.06.099
日期:2007.10
A mild access to 1,1-disubstituted tetrahydro-beta-carbolines is described. Tryptamine is subjected to Pictet-Spengler cyclization with various ketones using iodine. (C) 2007 Elsevier Ltd. All rights reserved.
KOLETAR, G.;FROST, J.;DUPONT, R.;LARDENOIS, P.;MOREL, C.;NAJER, H.
作者:KOLETAR, G.、FROST, J.、DUPONT, R.、LARDENOIS, P.、MOREL, C.、NAJER, H.
DOI:——
日期:——
US4272539A
申请人:——
公开号:US4272539A
公开(公告)日:1981-06-09
US4336256A
申请人:——
公开号:US4336256A
公开(公告)日:1982-06-22
Pyridoindole derivatives
申请人:Synthelabo
公开号:US04272539A1
公开(公告)日:1981-06-09
Pyridoindole derivatives of formula ##STR1## n=0 or 1; R.sub.1 =H, Hal, alk, alk-O-, CF.sub.3 ; R.sub.2 =--COOalk; --CONHR.sub.5 (R.sub.5 =H or various substituents); R.sub.3 =H, alk, --COOalk; R.sub.4 =H, Ac, alk, --CONHR.sub.6 (R.sub.6 =H or various substituents), and acid addition salts, except certain known compounds, are useful in treating anoxia and depression and in psychotropic therapy. They are prepared from tryptamine or a derivative thereof by reaction thereof with a pyruvic ester or 3-ethoxycarbonyl-1,2-dioxo-1-ethoxypropane to form compounds in which R.sub.4 is H and R.sub.2 is --COOalk. These compounds are reacted with amines, isocyanates or usual N-acylating or N-alkylating reagents to prepare the other compounds.