Nucleophilic substitution of propargyl alcohols with aliphatic alcohols, aliphatic amines and heterocycles catalyzed by 4-nitrobenzenesulfonic acid: a scalable and metal-free process
作者:S. Antony Savarimuthu、D.G. Leo Prakash、S. Augustine Thomas
DOI:10.1016/j.tetlet.2014.02.086
日期:2014.5
It is aimed to provide a cost effective p-NBSA catalyzed nucleophilic substitution of propargyl alcohols with alcohols, amines and heterocycles, without employing corrosive and costly metal catalysts, toxic solvents and column chromatography for purification. A systematic study of CC, CN and CO bond formation and efficacy of the scalability have also been confirmed.
An Alternative Approach to Direct Aldol Reaction Based on Gold-Catalyzed Methoxyl Transfer
作者:Moran Zhang、Yunxia Wang、Yang Yang、Xiangdong Hu
DOI:10.1002/adsc.201100789
日期:2012.4.16
A mild and catalyzed alternative to the direct aldol reaction has been developed based on the gold‐catalyzed methoxy group transfer from dimethyl acetals to terminal alkynes. Due to the simultaneous activation of the acetals, this aldol approach is only functional for acetals but not aldehydes. A ligand effect from the gold complex has also been observed.
Heterogeneous gold(I)-catalyzed three-component reaction of aldehydes, alkynes, and orthoformates toward propargyl ethers
作者:Jiajun Zeng、Feiyan Yi、Mingzhong Cai
DOI:10.1080/00397911.2020.1761391
日期:2020.7.2
Abstract A novel and efficient heterogeneous gold(I)-catalyzed three-component reaction of aldehydes, alkynes, and orthoformates has been developed that proceeds smoothly in dichloroethane (DCE) at 83 °C in the presence of 5 mol% magnetic nanoparticles-anchored phosphine gold(I) complex (Fe3O4@SiO2-P-AuOTf) and offers a general and practical approach for the preparation of a variety of propargyl ethers