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.
Asymmetric Biocatalytic Synthesis of 1‐Aryltetrahydro‐β‐carbolines Enabled by “Substrate Walking”
作者:Elisabeth Eger、Joerg H. Schrittwieser、Dennis Wetzl、Hans Iding、Bernd Kuhn、Wolfgang Kroutil
DOI:10.1002/chem.202004449
日期:2020.12.9
Stereoselective catalysts for the Pictet–Spenglerreaction of tryptamines and aldehydes may allow a simple and fast approach to chiral 1‐substituted tetrahydro‐β‐carbolines. Although biocatalysts have previously been employed for the Pictet–Spenglerreaction, not a single one accepts benzaldehyde and its substituted derivatives. To address this challenge, a combination of substrate walking and transfer of beneficial