One-pot Tandem Reactions for Direct Conversion of Thiols and Disulfides to Sulfonic Esters, Alcohols to Bis(indolyl)methanes and Synthesis of Pyrroles Catalyzed by N-Chloro Reagents
convenient synthesis of sulfonic esters from thiols and disulfides has been described. In situ preparation of sulfonyl chlorides from thiols is accomplished by oxidation with Chloramin-T, tetra-butylammonium chloride (t-Bu4NCl) and water. The sulfonyl chlorides are then further allowed to react with phenol derivatives in the same reaction vessel. Also, a facile synthesis of bis(indolyl)methanes from alcohols
Phosphine‐Free Manganese(II)‐Catalyst Enables Acceptorless Dehydrogenative Coupling of Alcohols with Indoles
作者:Vinita Yadav、Ekambaram Balaraman、Santosh B. Mhaske
DOI:10.1002/adsc.202100621
日期:2021.9.21
molecularly defined NNN−Mn(II) pincer complex catalyzed acceptorless dehydrogenative coupling of alcohols with indoles is reported. A wide variety of symmetrical and unsymmetrical bis(indolyl)methane derivatives as well as some structurally important products such as Vibrindole A, Turbomycin B alkaloid, Antileukemic, and Anticancer agents were synthesized. Mechanistic studies illustrate the importance
本文报道了一种空气稳定的、分子定义的 NNN-Mn(II) 钳形复合物催化醇与吲哚的无受体脱氢偶联。合成了多种对称和非对称双(吲哚基)甲烷衍生物以及一些结构上重要的产品,如 Vibrindole A、Turbomycin B 生物碱、抗白血病和抗癌剂。机理研究说明了 NH 部分在配合物中的重要性以及金属-配体合作在催化过程中的关键作用。
Synthesis of 3‐substituted indoles promoted by pulverization‐activation method catalyzed by Bi(NO
<sub>3</sub>
)
<sub>3</sub>
·5H
<sub>2</sub>
O
作者:Mohammad M. Khodaei、Parvin Ghanbary、Iraj Mohammadpoor‐Baltork、Hamid R. Memarian、Ahmad R. Khosropour、Kobra Nikoofar
DOI:10.1002/jhet.5570450213
日期:2008.3
A new, facile, efficient, “green” and chemoselective procedure for the synthesis of indole derivatives has been developed with pulverization-activation method catalyzed by Bi(NO3)3·5H2O (PAMC- Bi(NO3)3·5H2O) through grinding of indoles with aldehydes or Michael acceptors in the presence of catalytic amounts of Bi(NO3)3·5H2O undersolvent-freeconditions.
In situ generation of Iron(<scp>iii</scp>) dodecyl sulfate as Lewis acid-surfactant catalyst for synthesis of bis-indolyl, tris-indolyl, Di(bis-indolyl), Tri(bis-indolyl), tetra(bis-indolyl)methanes and 3-alkylated indole compounds in water
Iron(III) dodecyl sulfate as Lewis acid-surfactant catalyst was prepared in situ and effectively used in the synthesis of bis(indolyl)methanes and Michael reactions of indoles with α,β-unsaturated carbonyl compounds in water. Also, this method was used for the synthesis of 1,1,3-tri-indolyl compounds, producing good to excellent yield at room temperature.
new polyacrylonitrile fiber‐supported Brønsted acid catalyst has been developed and verified to efficiently (high yield, 10 cycles) mediate Biginelli reactions in ethanol, Pechmann condensations in toluene, Friedel–Crafts alkylations of indoles in water and conversion of fructose in dimethyl sulfoxide (DMSO) and mixed‐aqueous system.