Copper-Catalyzed Oxidative Transformation of Secondary Alcohols to 1,5-Disubstituted Tetrazoles
作者:Balaji V. Rokade、Karthik Gadde、Kandikere Ramaiah Prabhu
DOI:10.1002/adsc.201300863
日期:2014.3.24
A mild and convenient oxidativetransformation of secondaryalcohols to 1,5‐disubstituted tetrazoles is uncovered by employing trimethylsilyl azide (TMSN3) as a nitrogen source in the presence of a catalytic amount of copper(II) perchlorate hexahydrate [Cu(ClO4)2.6 H2O] (5 mol%) and 2,3‐dichloro‐5,6‐dicyano‐para‐benzoquinone (DDQ) (1.2 equiv.) as an oxidant. This reaction is performed under ambient
在催化量的高氯酸铜(II)六水合物[Cu(ClO 4)]存在下,通过使用三甲基叠氮化硅(TMSN 3)作为氮源,发现了中等程度的醇向1,5-二取代的四唑进行温和且方便的氧化转化。2 。6 H 2 O](5 mol%)和2,3-二氯-5,6-二氰基对苯醌(DDQ)(1.2当量)作为氧化剂。该反应在环境条件下进行,并通过CC键裂解进行。
An efficient synthesis of nitrile, tetrazole and urea from carbonyl compounds
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。
Gold-Catalyzed Synthesis of Tetrazoles from Alkynes by CC Bond Cleavage
作者:Morgane Gaydou、Antonio M. Echavarren
DOI:10.1002/anie.201308076
日期:2013.12.9
Golden duality: Tetrazoles are formed by the reaction of alkynes with TMSN3 (TMS=trimethylsilyl) in the presence of iPrOH and the gold(I) catalyst [JohnPhosAu(MeCN)]SbF6. In this transformation gold plays a dual role, first activating the alkyne and then generating a Brønsted acid in situ.