<scp>AgI</scp>
‐promoted one‐pot synthesis of aminoindolizines via sequential
<scp>Mannich‐Grignard</scp>
addition and intramolecular cyclization in water
作者:Veeranna Guguloth、Ramesh Balaboina、Suresh Paidakula、Narasimha S. Thirukovela、Ravinder Vadde
DOI:10.1002/jhet.4184
日期:2021.3
The efficient synthesis of aminoindolizines in ecofriendly water with broad substrate scope from the mild and readily available AgI‐catalyzed one‐pot three‐component reaction of pyridine‐2‐carboxaldehyde, secondary amines, and terminal alkynes proceeds through the sequential Mannich‐Grignard addition as well as intramolecularcyclization was reported for the first time.
ZnI2 was found to be an efficient catalyst for the synthesis of indolizine derivatives by a three-component coupling of pyridine-2-carboxaldehyde/quinoline-2-carboxaldehyde, secondary amines, and terminal alkynes in high yields. This protocol is compatible with a wide range of substrates and is expected to find broad applications due to its operational simplicity, shorter reaction time and low cost
发现ZnI 2是通过吡啶-2-羧醛/喹啉-2-羧醛,仲胺和末端炔烃的三组分偶联以高收率合成吲哚嗪衍生物的有效催化剂。该协议可与多种基材兼容,并且由于其操作简便,反应时间短和成本低廉,有望被广泛应用。初步的光物理研究表明,合成的吗啉代吡咯并[1,2- a ]喹啉代表了一类新的具有高量子产率的荧光团。
Clean and efficient synthesis of 3-aminoindolizines in one-pot using recyclable CuCN/[bmim]PF<sub>6</sub> system
Abstract Herein, we first time developed a simple, readily available, clean and efficient CuCN/[bmim][PF6] system for the one-potsynthesis of 3-aminoindolizines using commercially available starting materials which included pyridine-2-carbaldehyde, secondary amines, and terminal alkynes. As well, the CuCN/[bmim][PF6] system was reused six times without any appreciable change in its activity.