[EN] AZETIDINES AS EP2 ANTAGONISTS<br/>[FR] AZÉTIDINES
申请人:PFIZER LTD
公开号:WO2009063365A1
公开(公告)日:2009-05-22
The present invention relates to a class of EP2 antagonistazetidinesof general formula (I), wherein the variables and substituents are as defined herein,and especially to EP2 antagonist compounds, to their use in medicine, particularly in the treatment of endometriosis and/or uterine fibroids (leiomyomata)and to intermediates usefulin their synthesis and to compositions containing them.
Bu<sub>4</sub>NI-Catalyzed, Radical-Induced Regioselective <i>N</i>-Alkylations and Arylations of Tetrazoles Using Organic Peroxides/Peresters
作者:Suresh Rajamanickam、Chitranjan Sah、Bilal Ahmad Mir、Subhendu Ghosh、Garima Sethi、Vinita Yadav、Sugumar Venkataramani、Bhisma K. Patel
DOI:10.1021/acs.joc.9b02875
日期:2020.2.21
using tert-butyl hydroperoxide (TBHP) as the methyl source, alkyl diacyl peroxides as the primary alkyl source, alkyl peresters as the secondary and tertiaryalkyl sources, and aryl diacyl peroxides as the arylating source. These reactions proceed without pre-functionalization of tetrazole and in the absence of any metal catalysts. Here, peroxides serve the dual role of oxidants as well as alkylating or
Preparation of 5-Aryl-2-Alkyltetrazoles with Aromatic Aldehydes, Alkylhydrazine, Di-<i>tert</i>-butyl Azodicarboxylate, and [Bis(trifluoroacetoxy)iodo]benzene
directly prepared in good to moderate yields by the reaction of aromatic aldehydes with methylhydrazine and benzylhydrazine, followed by treatment with di-tert-butyl azodicarboxylate and [bis(trifluoroacetoxy)iodo]benzene in a mixture of dichloromethane and 2,2,2-trifluoroethanol at room temperature. The present method is a novel one-pot preparation of 5-aryl-2-methyltetrazoles and 5-aryl-2-benzyltetrazoles
ZrO2 Nanoparticles-Supported Cu2(II)-β-Cyclodextrin Mediated Synthesis of N-2 Substituted Tetrazoles by [2+3] Cycloaddition and Post Tetrazole Alkylation
作者:Yarabhally R. Girish、Kothanahally S. Sharath Kumar、Kereyagalahally H. Narasimhamurthy、Kanchugarakoppal S. Rangappa、Sheena Shashikanth
DOI:10.14233/ajchem.2018.21192
日期:——
An efficient one-pot ZrO2 nanoparticles-supported Cu2(II)-β-cyclodextrin promoted [2+3] cycloaddition of benzonitriles and sodium azide followed by post tetrazole alkylation using aralkyl esters for the synthesis of N-2-substituted tetrazoles has been presented. One-pot operation, atom-economical, regioselectivity and good yields are the main advantages of this protocol. From the atom economy, it is clear that, catalyst can be reused up to four times without any appreciable changes in catalytic activity