The reactions of aromatic aldehydes with tryptamine (1) in solvents of different polarity were studied. The yields of carbolines in the chosen media decrease with ail increase in the donating properties of the aryl substituent, but they markedly increase at a high pressure (5 kbar), especially for compounds with electron-donating aryl groups. The phase transition of dioxane at 5 kbar also sharply increases the yields of the target products.
Microwave‐Assisted One‐Pot Preparation of Tetrahydro‐β‐carboline Hydrochlorides under Solvent‐Free Conditions
作者:Fei Liu、Qi‐Dong You
DOI:10.1080/00397910701572555
日期:2007.11
An efficient and environmentally friendly synthesis of tetrahydro-beta-carboline hydrochlorides via Pictet-Spengler reaction was described. Tryptamine hydrochlorides were used as the reactant and no additional acid catalyst was needed. This reaction was completed within 2.5-9 min in good yield.
——
作者:N. E. Agafonov、A. V. Dudin、A. A. Preobrazhenskii、V. M. Zhulin
DOI:10.1023/a:1011306517653
日期:——
The reactions of aromatic aldehydes with tryptamine (1) in solvents of different polarity were studied. The yields of carbolines in the chosen media decrease with ail increase in the donating properties of the aryl substituent, but they markedly increase at a high pressure (5 kbar), especially for compounds with electron-donating aryl groups. The phase transition of dioxane at 5 kbar also sharply increases the yields of the target products.