一个Ñ -杂环(四唑) -稳定pseudocyclicλ 3 -iodane合成和其热稳定性和氧化还原活性进行了研究。同时进行热重分析和差示扫描量热法显示,多价碘化合物在127°C时开始降解,并在147°C时显示出明显的放热分解峰,这明显比带有单价碘的母体四唑更明显。通过循环伏安法测定的还原电位为-0.38 V vs AgNO 3| Ag在二甲基亚砜中的扫描速率为0.02 V / s。多价碘化合物的氧化能力通过将硫代苯甲醚氧化为亚砜和将硫代苯甲酰胺氧化二聚为3,5-二苯基-1,2,4-噻二唑来证明。
Cobalt-Catalyzed Hydroamination of Alkenes with 5-Substituted Tetrazoles: Facile Access to 2,5-Disubstituted Tetrazoles and Asymmetric Intermolecular Hydroaminations
作者:Kenzo Yahata、Yuki Kaneko、Shuji Akai
DOI:10.1248/cpb.c20-00068
日期:2020.4.1
Herein, we describe a novel synthetic method for 2,5-disubstituted tetrazoles from 5-substituted tetrazoles using cobalt-catalyzed intermolecular hydroamination reaction of nonactivated olefins. Owing to its mild conditions, the method enabled the use of substrates having acid-labile functional groups, such as silyloxy and methoxymethyloxy groups. By using optically active cobalt complexes, asymmetric
Nitrosation of N-formyl amidrazones 8a–g with sodium nitrite-aqueous hydrochloric acid gives tetrazoles 10a–g in good yields.
用亚硝酸钠-盐酸水溶液亚硝化8a-g N-甲酰胺基酰胺,可得到高产率的四唑10a-g。
[EN] COUPLING REACTIONS USEFUL IN THE PREPARATION OF (1H-TETRAZOL-5-YL)-BIPHENYL DERIVATIVES<br/>[FR] REACTIONS DE COUPLAGE UTILISEES POUR LA PREPARATION DE DERIVES (1H-TETRAZOL-5-YL)-BIPHENYL
申请人:NOVARTIS AG
公开号:WO2005075462A1
公开(公告)日:2005-08-18
The present invention relates to a process for the manufacture of intermediates that may be used for the manufacture of ARBs (also called angiotension II receptor antagonists or AT1 receptor antagonists) comprising as a common structural feature a (lH-tetrazol-5-yl)-biphenyl ring. Form PCT/ISA/210 (continuation of first sheet (3)) (January 2004)
Coupling reactions useful in the preparation of (1h-tetrazol-5-yl) biphenyl derivatives
申请人:Krell Christoph
公开号:US20070129413A1
公开(公告)日:2007-06-07
The present invention relates to a process for the manufacture of intermediates that may be used for the manufacture of ARBs (also called angiotension II receptor antagonists or AT1 receptor antagonists) comprising as a common structural feature a (1H-tetrazol-5-yl)-biphenyl ring. Form PCT/ISA/210 (continuation of first sheet (3)) (January 2004)
COUPLING REACTIONS USEFUL IN THE PREPARATION OF (1H-TETRAZOL-5-YL) BIPHENYL DERIVATIVES
申请人:Krell Christoph
公开号:US20100152458A1
公开(公告)日:2010-06-17
The present invention relates to a process for the manufacture of intermediates that may be used for the manufacture of ARBs (also called angiotension II receptor antagonists or AT
1
receptor antagonists) comprising as a common structural feature a tetrazole ring.