Base-Mediated Direct Transformation of N-Propargylamines into 2,3,5-Trisubstituted 1H-Pyrroles
摘要:
An efficient and base-mediated intramolecular cyclization of N-propargylamines for the synthesis of structurally diversified pyrroles in high yield has been described. The developed methodology is broadly applicable and is tolerated by a variety of functional groups. Key intermediates of natural product discoipyrrole C as well as HMG-CoA-reductase inhibitor have been successfully synthesized using developed chemistry. The proposed mechanism was supported by control experiments.
Facile and diverse microwave-assisted synthesis of secondary propargylamines in water using CuCl/CuCl<sub>2</sub>
作者:Tran Thi Thu Trang、Denis S. Ermolat'ev、Erik V. Van der Eycken
DOI:10.1039/c4ra16005c
日期:——
A highly efficient microwave-assisted three-component reaction between an aldehyde, a primary amine and an alkyne was developed using an inexpensive Cu(i)/Cu(ii) catalytic system and water as solvent.
Synthesis of Substituted Oxazoles from<i>N</i>-Benzyl Propargyl Amines and Acid Chlorides
作者:Henrik v. Wachenfeldt、Filip Paulsen、Anders Sundin、Daniel Strand
DOI:10.1002/ejoc.201300285
日期:2013.7
The reaction between N-benzylpropargylamines and acid chlorides at elevated temperatures provides efficient, direct access to a variety of di- and tri-substituted oxazoles. The versatility of this reaction is explored and 21 examples are demonstrated. The usefulness of the methodology is showcased through the short and efficient formal syntheses of medicinally relevant drugs aleglitazar and romazarit
aliphatic amines, whereas it is quite general regarding the aldehyde, alkyne and isocyanide inputs. The protocol allows the preparation of a wide array of adducts, tandem one-pot processes being also feasible. Mechanistic studies using selected substrates have been used to determine the profile of the reaction and some substitution and functional group limitations. Some post-synthetic transformations of the
Efficient Microwave-Assisted Synthesis of Secondary Alkylpropargylamines by Using A<sup>3</sup>-Coupling with Primary Aliphatic Amines
作者:Jitender B. Bariwal、Denis S. Ermolat'ev、Erik V. Van der Eycken
DOI:10.1002/chem.200903143
日期:2010.3.15
Three‐component coupling reaction: An efficient, microwave‐assisted, CuI‐catalysed A3‐coupling reaction with primaryaliphaticamines that gives access to secondary propargylamines is described (see scheme).
Lewis acid promoted alkynylation of imines with terminal alkynes: simple, mild and efficient preparation of propargylic amines
作者:Biao Jiang、Yu-Gui Si
DOI:10.1016/s0040-4039(03)01674-5
日期:2003.8
A mild and efficient addition of terminal alkynes to imines in the presence of ZnCl2, Et3N and TMSCl gives propargylamines in good yields. (C) 2003 Elsevier Ltd. All rights reserved.