Decarboxylative formation of N-alkyl pyrroles from 4-hydroxyproline
作者:Indubhusan Deb、Daniel J. Coiro、Daniel Seidel
DOI:10.1039/c1cc11560j
日期:——
N-Alkyl pyrroles are obtained in a single step from 4-hydroxyproline and aldehydes in just 15 min under microwave irradiation.
在微波辐射下,仅用15分钟即可从4-羟基脯氨酸和醛一步获得N-烷基吡咯。
Synthesis of N-alkyl pyrroles via decarboxylation/dehydration in neutral ionic liquid under catalyst-free conditions
作者:Veena D. Yadav、Shashikant U. Dighe、Sanjay Batra
DOI:10.1039/c4ra09797a
日期:——
A catalyst-free benign route toN-alkyl pyrroles by reacting aromatic, heteroaromatic or aliphatic aldehydes with 4-hydroxyproline in neutral ionic liquid under microwave irradiation is presented.
An Atom-Economical Method for the Formation of Amidopyrroles Exploiting the Self-Assembled Resorcinarene Capsule
作者:Pellegrino La Manna、Carmen Talotta、Margherita De Rosa、Annunziata Soriente、Carmine Gaeta、Placido Neri
DOI:10.1021/acs.orglett.0c00529
日期:2020.4.3
Here is reported the first example of an organocatalyzed coupling between pyrrole and isocyanates in a nanoconfined space. The hexameric resorcinarene capsule C is able to catalyze the direct coupling between isocyanates and pyrroles to give amidopyrroles with excellent yields and selectivities. The reaction catalyzed by C prevents the use of expensive and poorly atom-economical reagents. As in natural
Single‐Atom Cobalt‐Catalyzed Transfer Hydrogenation of Azides and One‐Pot Synthesis of Pyrroles
作者:Dibyajyoti Panja、Anirban Sau、Seema D. Thakur、Sadhan Dey、Rajib Sahu、Sabuj Kundu
DOI:10.1002/adsc.202300556
日期:2023.9.5
single-atom cobalt-catalyzed transfer hydrogenation (TH) of azides is reported under mild conditions (at 30 °C in 30 min) using NH2NH2 ⋅ H2O as the hydrogen source. Employing this protocol, a wide range of azides were transformed to their corresponding amines. This methodology was extended towards the synthesis of several important N-substituted pyrroles from azides in one-pot manner. The control experiments
在这项工作中,报道了在温和条件下(30°C,30 分钟)使用 NH 2 NH 2 ⋅ H 2 O 作为氢源,单原子钴催化叠氮化物的转移氢化(TH)。采用该方案,多种叠氮化物被转化为其相应的胺。该方法被扩展到以一锅法从叠氮化物合成几种重要的N-取代吡咯。对照实验表明,吸电子取代基有利于转移氢化,给电子取代基有利于一锅吡咯合成。可回收性测试表明,催化剂可回收最多 7次,催化活性没有明显损失。