A palladium-catalyzed N-acylation of tertiary amines by carboxylic acids was achieved through C–N cleavage. This reaction showed a wide substrate scope. Both aromatic and aliphatic acids served well as the acylating reagents and coupled with tertiary amines to produce the corresponding amides in good to excellent yields. With the strategy, bioactive carboxylic acids were also efficiently modified,
Palladium-Catalyzed Domino C–S Coupling/Carbonylation Reactions: An Efficient Synthesis of 2-Carbonylbenzo[<i>b</i>]thiophene Derivatives
作者:Fanlong Zeng、Howard Alper
DOI:10.1021/ol200880m
日期:2011.6.3
A facile and selective palladium-catalyzeddomino procedure has been developed for the preparation of 2-carbonylbenzo[b]thiophene derivatives from 2-gem-dihalovinylthiophenols. This protocol involves intramolecular C–S coupling/intermolecular carbonylation cascade sequences and allows access to various highly functionalized benzo[b]thiophenes in moderate yields.
一种简便的和选择性的钯催化的多米诺程序已被开发用于2- carbonylbenzo [制备b ]从2-噻吩衍生物宝石-dihalovinylthiophenols。该方案涉及分子内C–S偶联/分子间羰基化级联序列,并允许以中等收率获得各种高度官能化的苯并[ b ]噻吩。
Room-Temperature Decarboxylative Couplings of α-Oxocarboxylates with Aryl Halides by Merging Photoredox with Palladium Catalysis
作者:Wan-Min Cheng、Rui Shang、Hai-Zhu Yu、Yao Fu
DOI:10.1002/chem.201502286
日期:2015.9.14
Enabled by merging iridium photoredoxcatalysis and palladiumcatalysis, α‐oxocarboxylate salts can be decarboxylatively coupled with arylhalides to generate aromatic ketones and amides at room temperature. DFT calculations suggest that this reaction proceeds through a Pd0–PdII–PdIII pathway, in which the PdIII intermediate is responsible for reoxidizing IrII to complete the IrIII–*IrIII–IrII photoredox
通过合并铱的光氧化还原催化和钯催化,α-氧代羧酸盐可以与芳基卤化物脱羧偶联,在室温下生成芳族酮和酰胺。DFT计算表明,该反应通过Pd 0 -Pd II -Pd III途径进行,其中Pd III中间体负责重新氧化Ir II以完成Ir III- * Ir III -Ir II光氧化还原循环。
Rapid Access to 3-Aminoindazoles from Tertiary Amides
作者:Patrick Cyr、Sophie Régnier、William S. Bechara、André B. Charette
DOI:10.1021/acs.orglett.5b00765
日期:2015.7.17
two-step synthesis of structurally diverse 3-aminoindazoles from readily available starting materials was developed. This sequence includes a one-pot synthesis of aminohydrazones through chemoselective Tf2O-mediated activation of tertiary amides and subsequent addition of nucleophilic hydrazides. These precursors then participate in an intramolecularligand-free Pd-catalyzed C–H aminationreaction. The