Carboxyl-mediated Pictet-Spengler reaction. Direct synthesis of 1,2,3,4-tetrahydro-.beta.-carbolines from tryptamine-2-carboxylic acids
摘要:
The Pictet-Spengler condensation of various tryptamine-2-carboxylic acids 9a-f with carbonyl compounds in benzene/dioxane/trifluoroacetic acid (Table I) with simultaneous loss of carbon dioxide afforded directly the corresponding 1,2,3,4-tetrahydro-beta-carbolines 14a-j in good to excellent yields. This reaction greatly enhances the use of the Abramovitch-Shapiro method for the synthesis of highly oxygenated ring A substituted 1,2,3,4-tetrahydro-beta-carbolines (THBC). The lactams 14f,g and 14h are key intermediates for the synthesis of ring A substituted 1-methoxycanthin-6-one analogues.
Carboxyl-mediated pictet-spengler reaction. Direct synthesis of 1,2,3,4-tetrahydro β-carbolines from tryptamine-2-carboxylic acids.
作者:Krishnaswamy Narayanan、James M Cook
DOI:10.1016/s0040-4039(00)97406-9
日期:1990.1
The Pictet-Spengler condensation of various tryptamine-2-carboxylicacids 1 with carbonyl compounds in benzene/dioxane/trifiuoroacetic acid (Table) with simultaneous loss of carbon dioxide, afforded directly the corresponding 1,2,3,4-tetrahydro β-carbolines 4 in good to excellent yields.
NARAYANAN, KRISHNASWAMY;COOK, JAMES M., TETRAHEDRON LETT., 31,(1990) N4, C. 3397-3400
作者:NARAYANAN, KRISHNASWAMY、COOK, JAMES M.
DOI:——
日期:——
NARAYANAN, KRISHNASWAMY;SCHINDLER, LIESL;COOK, JAMES M., J. ORG. CHEM., 56,(1991) N, C. 359-365
作者:NARAYANAN, KRISHNASWAMY、SCHINDLER, LIESL、COOK, JAMES M.
DOI:——
日期:——
Carboxyl-mediated Pictet-Spengler reaction. Direct synthesis of 1,2,3,4-tetrahydro-.beta.-carbolines from tryptamine-2-carboxylic acids
作者:Krishnaswamy Narayanan、Liesl Schindler、James M. Cook
DOI:10.1021/jo00001a066
日期:1991.1
The Pictet-Spengler condensation of various tryptamine-2-carboxylic acids 9a-f with carbonyl compounds in benzene/dioxane/trifluoroacetic acid (Table I) with simultaneous loss of carbon dioxide afforded directly the corresponding 1,2,3,4-tetrahydro-beta-carbolines 14a-j in good to excellent yields. This reaction greatly enhances the use of the Abramovitch-Shapiro method for the synthesis of highly oxygenated ring A substituted 1,2,3,4-tetrahydro-beta-carbolines (THBC). The lactams 14f,g and 14h are key intermediates for the synthesis of ring A substituted 1-methoxycanthin-6-one analogues.