5-Benzyl-1H-tetrazols from the reaction of 1-aryl-5-methyl-1H-tetrazoles with 1,2-dehydrobenzene
摘要:
A series of 1-aryl-5-benzyl-1H-tetrazoles has been obtained during the reaction of 1-aryl-5-methyl-1H-tetrazoles with 1,2-dehydrobenzene. The mechanism of product formation was investigated. (c) 2005 Elsevier Ltd. All rights reserved.
A novel method for the stereospecificsynthesis of 1,5-disubstituted tetrazoles from ketoximes via the Beckmann rearrangement was developed using diphenyl phosphorazidate (DPPA) as both the oxime activator and azide source. Various ketoximes were transformed into the corresponding 1,5-disubstituted tetrazoles with exclusive trans-group migration and no E-Z isomerization of the ketoxime. This method
Dehydrative Beckmann rearrangement and the following cascade reactions
作者:Yongjiao Wei、Yinghui Liu、Lan-Gui Xie
DOI:10.1016/j.cclet.2021.10.020
日期:2022.5
The Beckmannrearrangement has been predominantly studied for the synthesis of amide and lactam. By strategically using the in situ generated Appel's salt or Mitsunobu's zwitterionic adduct as the dehydrating agent, a series of Beckmannrearrangement and following cascade reactions have been developed herein. The protocol allows the conversion of various ketoximes into amide, thioamide, tetrazole and
A novel method was developed for the synthesis of tetrazoles from amides utilizing diphenyl phosphorazidate or bis(p-nitrophenyl) phosphorazidate as both the activator of amide–oxygen for elimination and azide source. Various amides were converted into the corresponding tetrazoles in good yields. This synthetic method allows to prepare 1,5-disubstituted and 5-substituted 1H-tetrazoles from various
A facile and convenient synthesis of substituted tetrazole derivatives from ketones or α,β-unsaturated ketones
作者:Abdel-Aziz S. El-Ahl、Saad S. Elmorsy、Hanan Soliman、Fathy A. Amer
DOI:10.1016/0040-4039(95)01513-h
日期:1995.10
Triazidochlorosilane (SiCl4 - NaN3 in situ) is a new and efficient reagent for the direct conversion of ketones or α,β-unsaturated ketones to the corresponding tetrazole derivatives in nearly quantitative yield.
An efficient conversion of carbonyl compounds (aldehydes and ketones) to nitrile, tetrazole, and urea was developed with the use of a POCl3 and sodium azide mixture using a convergent and microwave method. This is the first report on the direct conversion of ketone to urea. The synthesized compounds were characterized by 1H NMR, 13C NMR, mass and IR spectroscopies and were found to be in agreement
通过使用会聚和微波方法使用POCl 3和叠氮化钠混合物,开发了将羰基化合物(醛和酮)有效转化为腈,四唑和尿素的方法。这是有关酮直接转化为尿素的第一份报告。合成的化合物通过1 H NMR,13 C NMR,质谱和IR光谱进行表征,并且发现与报道的化合物一致。