Benzannulation of 2-Alkenylindoles using Aldehydes by Sequential Triple-Relay Catalysis: A Route to Carbazoles and Carbazole Alkaloids
作者:Ankush Banerjee、Samrat Sahu、Modhu Sudan Maji
DOI:10.1002/adsc.201700092
日期:2017.6.6
sequential triple‐relay‐catalysis, provides an easy access to several structurally unique carbazoles including 2‐ and 3‐alkenylcarbazoles. This protectinggroup‐free method enabled one‐pot synthesis of alkaloids such as hyellazole and 6‐chlorohyellazole, and the formal syntheses of seven other alkaloids. Construction of the core structure, present in murastifoline A, murrafoline E, and related alkaloids was
Formal [4 + 2] benzannulation of 2-alkenyl indoles with aldehydes: a route to structurally diverse carbazoles and bis-carbazoles
作者:Ankush Banerjee、Avishek Guin、Shuvendu Saha、Anushree Mondal、Modhu Sudan Maji
DOI:10.1039/c8ob02875c
日期:——
Construction of structurally diverse carbazoles and bis-carbazoles by protecting-group-free formal [4 + 2]-benzannulation of 2-alkenyl indoles and aldehydes is demonstrated. The sequence of four different reactions is executed in one-pot using readily available and cheap bottle reagents as catalysts rendering this method attractive. The incorporation of inexpensive and environmentally benign molecular
The regioselectivehydroformylation of enamides with a catalyst derived from monodentate phosphites and Rh(acac)(CO)2 was studied. In the hydroformylation of N-vinylphthalimide, all the biphenol-based ligands led to the branched aldehyde; the fastest reaction was observed when using a sterically bulky phosphite. The olefins (E)-N-propenylphthalimide, vinylpyrrolidone, vinylcaprolactam and vinylcarbazole
Provided are carbazole and carbazole-like compounds (e.g., pyridoindole and pyrrolodipyridine) compounds, that can be used to selectively kill cancer cells, specifically androgen-receptor expressing prostate cancer cells. Also provided is a method of treating AR-positive prostate cancer in a subject diagnosed with or suspected of having AR positive or negative cancer, comprising administering an effective amount of a carbazole and carbazole-like compound to said subject.
A Recyclable Electrochemical Reduction of Aldehydes and Ketones to Alcohols Using Water as the Hydrogen Source and Solvent
作者:Jiatai Zhang、Meng Chen、Jing Xiao、Hongliang Han、Jianyou Zhao、Lanlan Zhang、Fan Wang、Zhong-Quan Liu
DOI:10.1021/acs.joc.4c00476
日期:2024.5.17
hazardous hydrogensources and severe environmental pollution in the conventional reduction of aldehydes/ketones to alcohols. We report here a practical, safe, and green electrochemical reduction, which solves these problems to a large extent. Through an undivided cell, Zn(+) and Sn(−) as the electrode, tetrabutylammonium chloride (TBAC) as the electrolyte, water as the solvent and hydrogensource, a wide