Conversion of Arylboronic Acids to Tetrazoles Catalyzed by ONO Pincer-Type Palladium Complex
作者:Arumugam Vignesh、Nattamai S. P. Bhuvanesh、Nallasamy Dharmaraj
DOI:10.1021/acs.joc.6b02277
日期:2017.1.20
A convenientsynthesis of a library of tetrazoles through a novel and operationally simple protocol effecting the direct conversion of arylboronic acids catalyzed by a new ONO pincer-type Pd(II) complex under mild reactionconditions using the readily available reagents is reported. The palladium complex was reused up to four cycles in an open-flask condition.
Development and Demonstration of a Safer Protocol for the Synthesis of 5-Aryltetrazoles from Aryl Nitriles
作者:Daniel S. Treitler、Simon Leung、Mark Lindrud
DOI:10.1021/acs.oprd.7b00016
日期:2017.3.17
for a faster, safer protocol for the direct synthesis of 5-aryltetrazoles from aryl nitriles in the presence of sodium azide and an amine hydrochloride salt led to the discovery of a buffered system comprised of BnNH2, BnNH2·HCl, and NaN3. After optimization of reaction conditions and a thorough investigation of reaction safety, the procedure was demonstrated for the synthesis of several hundred grams
Mg, Fe, Na, Mn, and Sr. It showed an excellent catalytic performance in synthesizing of 5-substituted-1H-tetrazoles through [3 + 2] cycloaddition reactionbetween sodium azide and nitrile compounds. Various aliphatic and aromatic nitriles and sodium azide were reacted in the presence of a catalytic amount of igneous rock nano-powder at 80 o C temperature in PEG-400. The protocol was simple and rapid
报道了使用火成岩纳米粉作为非均相和可回收的多氧化物纳米催化剂合成5-取代-1H-四唑。最初采用球磨法制备火成岩纳米粉体。然后,通过FTIR、FESEM、XRF、XRD、Histogram和EDS等不同的光谱、显微和热重技术对制备的火成岩纳米粉的结构、形貌和磁性进行了表征。仪器分析表明,制备的火成岩粉末是Si、Al、Ca、Mg、Fe、Na、Mn、Sr等金属氧化物的混合物,在5-取代-1H的合成中表现出优异的催化性能。 -四唑通过叠氮化钠和腈化合物之间的[3 + 2]环加成反应。各种脂肪族和芳香族腈与叠氮化钠在催化量的火成岩纳米粉存在下在 80 o C 温度下在 PEG-400 中反应。该方案简单快速,获得的四唑收率合适。火成岩纳米粉末易于获取、可重复使用,并具有进一步应用于酸催化有机合成和工业需求的潜力。
Processes for preparing 1-butyl-2-[2'-(2H-tetrazol-5-yl)
申请人:Syntex (U.S.A.) Inc.
公开号:US05412102A1
公开(公告)日:1995-05-02
The present invention relates to processes for preparing 1-butyl-2-[2'-(2H-tetrazol-5-yl)biphenyl-4-ylmethyl]-1H-indole-3-carboxyli c acid and to intermediates useful in such processes. The present invention also relates to a process for deprotecting compounds containing a protected 2H-tetrazolyl group, which process comprises reacting a the protected compound with a Lewis acid in the presence of a thiol.
The present invention relates to a process for preparing 1-butyl-2-[2'-(2H-tetrazol-5-yl)biphenyl-4-ylmethyl]-1H-indole-3-carboxyli c acid and to intermediates useful in such process.