EFFICIENT PROCEDURE FOR THE PREPARATION OF AMIDES USING POLYMER-BOUND REAGENTS
摘要:
An effective method for the conversion of acids into amides is presented. The two-step procedure includes the preparation of acid chloride intermediates using Pol-Ph3P and subsequent treatment of these intermediates with amines and polymer-bound base. The amides were accessible in high yields and purities without further purification.
N-heterocyclic carbene-catalyzed oxidation of aldehydes for the synthesis of amides via phenolic esters
作者:Miran Ji、Seungyeon Lim、Hye-Young Jang
DOI:10.1039/c4ra04012k
日期:——
N-heterocyclic carbene-catalyzedoxidationusingTEMPO is reported for the conversion of aldehydes to amides. A wide range of amides were synthesized in good yields (up to 72%) via a one-pot, sequential protocol involving oxidative esterification of aldehydes and subsequent aminolysis. To promote efficient aminolysis, various alkoxide leaving groups were evaluated.
A highly improved and green methodology for the direct amidation of carboxylic acids with amines using silica gel as a solidsupport and catalyst is described. The scope of this...
β-Ketophosphonates formation via deesterification or deamidation of cinnamyl/alkynyl carboxylates or amides with H-phosphonates
作者:Yao Zhou、Mingxin Zhou、Ming Chen、Jihu Su、Jiangfeng Du、Qiuling Song
DOI:10.1039/c5ra23950h
日期:——
We report here an unprecedented Fe/Cu synergistically catalyzed deesterificative or deamidative oxyphosphorylation of unsaturated carboxylates or amides with H-phosphonates.
[3]Dendralene Synthesis: Rhodium(III)-Catalyzed Alkenyl CH Activation and Coupling Reaction with Allenyl Carbinol Carbonate
作者:Honggen Wang、Bernhard Beiring、Da-Gang Yu、Karl D. Collins、Frank Glorius
DOI:10.1002/anie.201306754
日期:2013.11.18
[3]DendrAl(l)ene! A new synthesis of [3]dendralenes is based on a RhIII‐catalyzed alkenyl CH activation and coupling reaction with allenyl carbinol carbonates (see scheme; DG=directing group). A variety of [3]dendralenes with diverse substitution patterns are accessible with good efficiency. The reaction is highly stereoselective and compatible with different directing groups and numerous functional
5H-3-oxa-Octafluoropentanesulfonyl fluoride: a novel and efficient condensing agent for esterification, amidation and anhydridization
作者:Zhaohua Yan、Weisheng Tian、Fanrong Zeng、Yanfeng Dai
DOI:10.1016/j.tetlet.2009.03.102
日期:2009.6
acids with amines in the presence of 1,3-diazabicyclo[5.4.0]-undec-7-ene (DBU) is reported. HCF2CF2OCF2CF2SO2F cannot serve as a condensing agent for anhydridization of carboxylic acids, however, HCF2CF2OCF2CF2SO2F/(CH3)3SiCN system can mediate anhydridization of some aromatic carboxylic acids.
5 H -3-氧杂八氟戊磺酰氟(HCF 2 CF 2 OCF 2 CF 2 SO 2 F)作为新型高效的缩合剂用于羧酸与醇的酯化和羧酸与胺的酰胺化报道了1,3-二氮杂双环[5.4.0]-十一碳-7-烯(DBU)。HCF 2 CF 2 OCF 2 CF 2 SO 2 F不能用作羧酸脱水的缩合剂,但是HCF 2 CF 2 OCF 2 CF 2 SO 2 F /(CH3)3 SiCN系统可以介导某些芳香族羧酸的脱水反应。