Cascade Process for Direct Transformation of Aldehydes (RCHO) to Nitriles (RCN) Using Inorganic Reagents NH<sub>2</sub>OH/Na<sub>2</sub>CO<sub>3</sub>/SO<sub>2</sub>F<sub>2</sub> in DMSO
作者:Wan-Yin Fang、Hua-Li Qin
DOI:10.1021/acs.joc.8b03164
日期:2019.5.3
and practical process for direct conversion of aldehydes to nitriles was developed feathering a wide substrate scope and great functional group tolerability (52 examples, over 90% yield in most cases) using inorganic reagents (NH2OH/Na2CO3/SO2F2) in DMSO. This method allows for transformations of readily available, inexpensive, and abundant aldehydes to highly valuable nitriles in a pot, atom, and
使用无机试剂(NH 2 OH / Na 2 CO )开发了一种简单,温和且实用的方法,将醛直接转化为腈,可在较宽的底物范围内实现出色的官能团耐受性(52个实例,大多数情况下产率超过90%)3 / SO 2 F 2)在DMSO中。该方法允许以易用,原子和步经济的方式将易于获得,廉价且丰富的醛转化为高度有价值的腈,而无需过渡金属。该协议将作为将氰基部分安装到复杂分子的强大工具。
DBU-Mediated Efficient Synthesis of Diaryl Ethynes and Enynes from 1,1-Dibromoalkenes at Room Temperature
作者:Yadagiri Thummala、Ashok K. Morri、Galla V. Karunakar、Venkata Ramana Doddi
DOI:10.1002/ejoc.201801143
日期:2018.12.6
The DBU plays a triple role as base, nucleophile and ligand in the synthesis of internal alkynes from 1,1‐dibromoalkenes at ambient temperature.
在环境温度下,DBU在由1,1-二溴代烯烃合成内部炔烃中,起着碱基,亲核试剂和配体的三重作用。
Synthesis and characterization of novel chiral NHC–palladium complexes and their application in copper-free Sonogashira reactions
作者:Longguang Yang、Pei Guan、Pan He、Qian Chen、Changsheng Cao、Yu Peng、Zhan Shi、Guangsheng Pang、Yanhui Shi
DOI:10.1039/c2dt12391f
日期:——
A new series of chiral N-heterocyclic carbene (NHC) palladium complexes were synthesized from a relatively inexpensive amino acid, L-phenylalanine. All these compounds were fully characterized by 1H-NMR, 13C-NMR and elemental analysis. The X-ray molecular structures of two of the complexes were reported. The catalytic activity of the four palladium complexes was successfully tested in the Sonogashira reaction under copper free conditions in air. The palladium complex 3a provided good activity in the Sonogashira coupling reaction.
Melamine-Based Microporous Network Polymer Supported Palladium Nanoparticles: A Stable and Efficient Catalyst for the Sonogashira Coupling Reaction in Water
A template consisting of a melamine‐based microporous polymer network was synthesized and utilized as a solid support to stabilize palladiumnanoparticles; the resulting Pd/SNW1 material showed good catalytic activity in copper‐free Sonogashiracoupling in water. Various aryl iodides were efficiently coupled with arylacetylenes under very low catalyst loadings in an environmentally benign medium. Hot
MCM-41-supported bidentate phosphine palladium(0) complex: a highly active and recyclable catalyst for the Sonogashira reaction of aryl iodides
作者:Mingzhong Cai、Junchao Sha、Qiuhua Xu
DOI:10.1016/j.tet.2007.03.111
日期:2007.5
The first MCM-41-supportedbidentatephosphine palladium(0) complex has been prepared. This complex is a highly efficientcatalyst for Sonogashira reaction and can be reused at least 10 times without any decrease in activity.