摘要 提出了由KO t -Bu促进的N'-芳基-2-卤代苯并肼合成N-芳基-2-卤代苯并肼合成1-芳基吲哚酮和2-芳基吲哚酮的新方法。2-卤素取代基的差异对产物的分布具有显着影响。提出了两种不同的反应途径分别用于生成1-芳基吲哚酮和2-芳基吲哚酮。 提出了由KO t -Bu促进的N'-芳基-2-卤代苯并肼合成N-芳基-2-卤代苯并肼合成1-芳基吲哚酮和2-芳基吲哚酮的新方法。2-卤素取代基的差异对产物的分布具有显着影响。提出了两种不同的反应途径分别用于生成1-芳基吲哚酮和2-芳基吲哚酮。
An efficient and convenient access to 1-substituted indazol-3-ones 2 has been achieved throughout the intramolecular C–N bond formations of 2-chloro-benzoic acid-N′-aryl and alkyl-hydrazides employing 0.5 mol% of cuprous (I) iodide and 20 mol% of L-proline as catalyst precursors under mild conditions in moderate to excellent yields.
A [4 + 3] Annulation Reaction of aza-<i>o</i>-Quinone Methides with Arylcarbohydrazonoyl Chlorides for Synthesis of 2,3-Dihydro-1<i>H</i>-benzo[<i>e</i>][1,2,4]triazepines
An unprecedented [4 + 3] annulation reaction of aza-ortho-quinone methides with arylcarbohydrazonoyl chlorides has been achieved under mild conditions. The annulation underwent a sequential conjugate addition/intramolecular annulation/rearrangement, providing a useful method for the synthesis of biologically interesting 2,3-dihydro-1H-benzo[e][1,2,4]triazepine.
在温和的条件下,已完成了氮杂-邻苯醌甲基化物与芳基羰基肼基甲酰氯的前所未有的[4 + 3]环化反应。进行连续的共轭加成/分子内的成环/重排,为生物上有趣的2,3-二氢-1 H-苯并[ e ] [1,2,4]三氮杂卓合成提供了有用的方法。
Palladium/copper-catalyzed arylation of alkenes with N′-acyl arylhydrazines
A novel ligand-free palladium/copper-catalyzed Heck-type coupling reaction of alkenes and N′-acyl arylhydrazines has been developed by using air as the terminal oxidant. This protocol features wide functional group tolerance and produces highly chemoselective and regioselective products with good to excellent yields.
Cu(<scp>ii</scp>)-catalyzed cross-dehydrogenative coupling reaction of N′-acyl arylhydrazines and phosphites
作者:Ji-Quan Zhang、Yan-Shi Xiong、Albert S. C. Chan、Gui Lu
DOI:10.1039/c6ra13931k
日期:——
A novel Cu(II)-catalyzed cross-dehydrogenative coupling reaction of N′-aryl acylhydrazines and dialkyl phosphites has been developed for the synthesis of phosphorylhydrazides by using NMO as an external oxidant and AgNO3 as additive. Various N′-aryl acylhydrazines were mildly and regioselectively converted to corresponding phosphorylhydrazides with good to excellent yields.