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 nickel-promoted cascadeannulation reaction for the facile synthesis of 3H-1,2,4-triazol-3-ones from readily available hydrazonoyl chlorides and sodium cyanate has been developed. The transformation occurs through a cascade nickel-promoted intermolecular nucleophilic addition–elimination process, intramolecular nucleophilic addition, and a hydrogen-transfer sequence. The method has been successfully
已经开发了镍促进的级联环化反应,用于从容易获得的酰肼基氯和氰酸钠容易地合成3 H -1,2,4-三唑-3-酮。通过级联镍促进的分子间亲核加成-消除过程,分子内亲核加成和氢转移序列进行转化。该方法已成功应用于血管紧张素II拮抗剂的核心骨架的构建。
Synthesis of Spirobidihydropyrazole through Double 1,3-Dipolar Cycloaddition of Nitrilimines with Allenoates
The double 1,3-dipolar cycloaddition of allenoates with nitrilimines has been achieved under mild reaction conditions, affording a variety of spirobidihydropyrazoles in moderate to excellent yields with excellent diastereoselectivities. The reaction diastereoselectively constructs double dihydropyrazole moieties and two chiral centers including a spiro carbon center.
Synthesis and Antifungal Activities of New Pyrazole Derivatives via 1,3-dipolar Cycloaddition Reaction
作者:Chuan-Yu Zhang、Xing-Hai Liu、Bao-Lei Wang、Su-Hua Wang、Zheng-Ming Li
DOI:10.1111/j.1747-0285.2010.00948.x
日期:——
A series of cycloadducts‐‐pyrazoles via 1,3‐dipolarcycloaddition reactions of generated nitrilimines with N‐(4‐chloro‐2‐fluorophenyl)maleimide were described. The novel compounds synthesized were characterized by 1H NMR, MS, and elemental analysis. The fungicidal tests showed that most of the title compounds exhibit significant fungicidal activities against Corynespora cassiicola.
通过生成的腈亚胺与N-(4-氯-2-氟代苯基)马来酰亚胺的1,3-偶极环加成反应描述了一系列环加合物-吡唑。合成的新型化合物通过1 H NMR,MS和元素分析进行表征。杀菌试验表明,大多数标题化合物对棒状杆菌都具有显着的杀菌活性。