Highly efficient Lewis acid-catalysed Pictet–Spengler reactions discovered by parallel screeningElectronic supplementary information (ESI) available: full experimental procedures. See http://www.rsc.org/suppdata/cc/b2/b212063a/
Potassium Superoxide as an Alternative Reagent for Winterfeldt Oxidation of β-Carbolines
作者:Weiqin Jiang、Xuqing Zhang、Zhihua Sui
DOI:10.1021/ol0271279
日期:2003.1.1
Potassiumsuperoxide was examined as an alternative oxidation reagent for the Winterfeldt reaction. KO(2) was found to be superior to the original Winterfeldt protocol for base-sensitive substrates. [reaction--see text]
PhI(OAc)<sub>2</sub>-mediated one-pot oxidative decarboxylation and aromatization of tetrahydro-β-carbolines: synthesis of norharmane, harmane, eudistomin U and eudistomin I
A new strategy for synthesis of β-carbolines via one-pot oxidative decarboxylation at room temperature is developed for the first time.
首次开发了一种在室温下通过一锅法氧化脱羧合成β-咔啉的新策略。
Reusable, homogeneous water soluble photoredox catalyzed oxidative dehydrogenation of N-heterocycles in a biphasic system: application to the synthesis of biologically active natural products
the substrate and catalyst at room temperature. Its potential applications to organic transformations are demonstrated by the synthesis of various biologically active N-heterocycles such as indoles, (iso)quinolines and β-carbolines and natural products such as eudistominU, norharmane, and harmane and precursors to perlolyrine and flazin. Without isolation and purification, the catalyst solution can
Microwave Assisted Pictet–Spengler and Bischler–Napieralski Reactions
作者:Bikash Pal、Parasuraman Jaisankar、Venkatachalam S. Giri
DOI:10.1081/scc-120021516
日期:2003.1.7
Abstract Pictet–Spengler and Bischler–Napieralskireaction products have been prepared–using microwave irradiation on silicagel support under solvent free condition. Microwave assisted reactions have resulted in better yields of the desired products than prepared under conventional conditions.
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