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.
A series of 1, 2, 3, 4-tetrahydro-β-carbolines has been synthesized and evaluated for cerebral protecting effects against lipid peroxidation and potassium cyanide intoxication in mice. Most of the compounds synthesized had potent effects against lipid peroxidation. Among them, 1-(3, 5-dimethoxyphenyl)-2-propyl-1, 2, 3, 4-tetrahydro-β-carboline (22) was found to have a combination of potent effects against both lipid peroxidation and potassium cyanide intoxication. Structure-activity relationships are discussed.
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.
Synthesis of β-carbolines via a silver-mediated oxidation of tetrahydro-β-carbolines
作者:Sierra D. Durham、Brianna Sierra、Maximillian J. Gomez、Jennifer K. Tran、Marc O. Anderson、Nick A. Whittington-Davis、Scott Eagon
DOI:10.1016/j.tetlet.2017.05.098
日期:2017.7
The oxidation of tetrahydro-β-carbolines to β-carbolines using silver carbonate was developed as an alternative to current methods. The oxidation is extremely mild and provides the products in modest to good yields after purification. A number of functional groups are tolerated by this methodology, including reduction-sensitive groups which are often cleaved with other methods. Though the mechanism