Intramolecular Pictet-Spengler reaction of N-alkoxytryptamines. 3. Stereoselective synthesis of (-)-debromoeudistomin L and (-)-O-methyldebromoeudistomin E and their stereoisomers
Formation of the oxathiazepine ring in eudistomins 1 was investigated. Thiazolidinyl-β-carboline 5 was successfully transformed into thiaindoloquinolizidine 7, but attempted oxidative transformation of 7 to 1 was not successful. The oxidative cyclization of 1-substituted-2 hydroxy-β-carboline 24 with NCS or the acid-catalyzed cyclization of the corresponding S-oxide 26 with TsOH gave oxathiazepine
Total synthesis of (-)-eudistomin L and (-)-debromoeudistomin L
作者:Masako Nakagawa、Jin Jun Liu、Tohru Hino
DOI:10.1021/ja00189a060
日期:1989.3
HERMKENS, PEDRO H. H.;MAARSEVEEN, JAN H.;OTTENHEIJM, HARRY C. J.;KRUSE, C+, J. ORG. CHEM., 55,(1990) N3, C. 3998-4006
作者:HERMKENS, PEDRO H. H.、MAARSEVEEN, JAN H.、OTTENHEIJM, HARRY C. J.、KRUSE, C+
DOI:——
日期:——
Intramolecular Pictet-Spengler reaction of N-alkoxytryptamines. 3. Stereoselective synthesis of (-)-debromoeudistomin L and (-)-O-methyldebromoeudistomin E and their stereoisomers
作者:Pedro H. H. Hermkens、Jan H. Van Maarseveen、Harry C. J. Ottenheijm、Chris G. Kruse、Hans W. Scheeren