Toward Continuous‐Flow Synthesis of Biologically Interesting Pyrazole Derivatives
作者:Amrita Das、Haruro Ishitani、Shū Kobayashi
DOI:10.1002/adsc.201900954
日期:2019.11.19
continuous‐flow synthesis of substituted pyrazolederivatives has been developed via the formation of vinylidene keto esters as key intermediates. Heterogeneous Ni2+‐montmorillonite was found to be an efficient catalyst for orthoester condensation of 1,3‐dicarbonyls under flow conditions. The intermediate reacted with methylhydrazine to afford pyrazolederivatives, for which suitable selection of a solvent
Compounds are disclosed having the formula: ##STR1## wherein the substituents are defined herein. The compounds of the invention are angiotensin II receptor antagonists.
NITROGEN-CONTAINING HETEROCYLIC COMPOUND OR SALT THEREOF
申请人:FUJIFILM Corporation
公开号:EP2944637A1
公开(公告)日:2015-11-18
A compound represented by Formula [1] (in the formula, Z1 represents N, CH, or the like; X1 represents NH or the like; R1 represents a heteroaryl group or the like; each of R2, R3, and R4 represents a hydrogen atom, a halogen atom, an alkoxy group, or the like; and R5 represents a heteroaryl group or the like) or salt thereof.
A one-pot process for the regioselective synthesis of 1,3,4-trisubstituted-1H-pyrazoles
作者:Steven A. Raw、Andrew T. Turner
DOI:10.1016/j.tetlet.2008.11.099
日期:2009.2
This Letter reports a facile and regioselective one-pot synthesis of 1,3,4-trisubstituted-1H-pyrazoles. It comprises a three-step telescoped sequence. which has been utilised in the production of a variety of differentially substituted pyrazoles. (C) 2008 Elsevier Ltd. All rights reserved.
MENOZZI, GIULIA;MOSTI, LUISA;E, SCHENONE PIETRO, J. HETEROCYCL. CHEM., 24,(1987) N 6, 1669-1675
作者:MENOZZI, GIULIA、MOSTI, LUISA、E, SCHENONE PIETRO