Palladium‐Catalysed Cyclisation of
<i>N</i>
‐Alkynyl Aminomalonates
作者:Wilfried Hess、Jonathan W. Burton
DOI:10.1002/chem.201001951
日期:2010.11.2
Go around in (hetero)cycles! The palladium‐catalysed tandem cyclisation/coupling reaction of alkynyl‐ and alkenyl‐substituted aminomalonates leads to highly functionalised pyrrolidines and piperidines in good yield (see scheme). The reaction allows efficient access to a broad range of synthetically valuable building blocks.
Stereodivergent Synthesis of N‐Heterocycles by Catalyst‐Controlled, Activity‐Directed Tandem Annulation of Diazo Compounds with Amino Alkynes
作者:Kai Liu、Chenghao Zhu、Junxiang Min、Shiyong Peng、Guangyang Xu、Jiangtao Sun
DOI:10.1002/anie.201507122
日期:2015.10.26
A stereodivergent synthesis of five‐membered N‐heterocycles, such as 2,3‐dihydropyrroles, and 2‐methylene and 3‐methylene pyrrolidines, has been developed through a tandem annulation of amino alkynes with diazo compounds and involves the trapping of in situ formed intermediates. Mechanistic investigations indicate that the copper‐catalyzed tandem annulations proceed by allenoate formation and subsequent
A Zinc(II) Catalyst System for the Conia-Ene Reaction of Alkynyl-Aminomalonates Applicable to 5-Endo-Dig Reactions
作者:Wilfried Hess、Jonathan W. Burton
DOI:10.1002/adsc.201100401
日期:2011.11
The zinc(II)-catalyzed 5-exo-dig (Conia-ene) and 5-endo-dig cyclizations of a range of alkynyl-α-aminomalonates give rise to nitrogen heterocycles with good efficiency. The reaction allows the synthesis of a broad range of synthetically useful building blocks.