A Direct, Versatile, and Chemoselective Synthesis of Vinylogous Bis- and Monourethanes/amides and β-Keto Esters by Aza-Knoevenagel-Type Reactions of Tertiary Amides with Enolates
作者:Pei-Qiang Huang、Wei Ou
DOI:10.1002/ejoc.201601326
日期:2017.1.18
carbanions generated from methyl ketones, malonic acid monoester, 2-phenylacetate, or (benzylsulfonyl)benzene. Moreover, when higher homologous of acetate was used, beta-keto esters were obtained directly from amides. The method has been applied to the one-step synthesis of several known key intermediates in the total synthesis of alkaloids and quinoline antibiotics. An efficient and mild intramolecular Friedel-Crafts
A facile and efficient protocol for the synthesis of amides has been developed in the absence of transition metals. The reaction was performed with a catalytic amount of n-Bu4NI and aqueous TBHP as an oxidant. Various alcohols with N,N-disubstituted formamides were examined to furnish the desired products in good yields.
在没有过渡金属的情况下,已经开发了一种简便而有效的酰胺合成方案。用催化量的n- Bu 4 NI和TBHP水溶液作为氧化剂进行反应。研究了具有N,N-二取代甲酰胺的各种醇,以高收率提供所需产物。
Efficient metal-free hydrosilylation of tertiary, secondary and primary amides to amines
作者:Enguerrand Blondiaux、Thibault Cantat
DOI:10.1039/c4cc02894e
日期:——
Hydrosilylation of secondary and tertiary amides to amines is described using catalytic amounts of B(C6F5)3. The organic catalyst enables the reduction of amides with cost-efficient, non-toxic and air stable PMHS and TMDS hydrosilanes. The methodology was successfully extended to the more challenging reduction of primary amides.
A copper‐catalyzedaerobicoxidative amidation reaction of inert CC bonds with tertiary amines has been developed for the synthesis of tertiary amides, which are significant units in many natural products, pharmaceuticals, and fine chemicals. This method combines CC bond activation, CN bond cleavage, and CH bond oxygenation in a one‐pot protocol, using molecular oxygen as the sole oxidant without
Deaminative Reductive Arylation Enabled by Nickel/Photoredox Dual Catalysis
作者:Jun Yi、Shorouk O. Badir、Lisa Marie Kammer、María Ribagorda、Gary A. Molander
DOI:10.1021/acs.orglett.9b01097
日期:2019.5.3
Described is a cross-electrophilic, deaminative coupling strategy harnessing Katritzky salts as a new species of electrophile in Ni/photoredoxdual catalytic reductive cross-coupling reactions. Distinguishing features of this arylation protocol include its mild reaction conditions, high chemoselectivity, and adaptability to a variety of complex substrates [i.e., pyridinium salts derived from amines