A method for the regioselective synthesis of 1-alkyl-1H-indazoles
摘要:
A method for the regioselective synthesis of 3-unsubstituted 1-alkyl-1H-indazoles, starting with 2-halobenzonitriles and N-alkylhydrazines, is described. The two-step reaction pathway proceeds through the intermediacy of 1-alkyl-3-amino-1H-indazoles followed by reductive deamination. (C) 2013 Elsevier Ltd. All rights reserved.
A robust protocol for Pd(ii)-catalyzed C-3 arylation of (1H) indazoles and pyrazoles: total synthesis of nigellidine hydrobromide
作者:Mengchun Ye、Andrew J. F. Edmunds、James A. Morris、David Sale、Yejia Zhang、Jin-Quan Yu
DOI:10.1039/c3sc50184a
日期:——
indazole and pyrazoles are privileged structural motifs in agrochemicals and pharmaceuticals. C-3 C-H arylation of (1H) indazole and pyrazole has been a significant challenge due to the poor reactivity of the C-3 position. Herein, we report a practical Pd(II)/Phen catalyst and conditions for direct C-3 arylation of indazole and pyrazole with ArI or ArBr without using Ag additives as halide scavengers. The
作者:Su Yu、Anthony Haight、Brian Kotecki、Lei Wang、Kirill Lukin、David R. Hill
DOI:10.1021/jo901943s
日期:2009.12.18
A five-step synthesis of a TRPV1 receptor antagonist 1 is described. The key step involves a novel palladium-catalyzed amidation reaction of 4-chloro-1-methylindazole 8 with the benzyl urea 9 to form the unsymmetrically substituted urea 1.
The invention relates to novel compounds of the formula (I)
in which R
1
, R
2
, R
3
, A
1
, X and n have the meanings given above,
to the use thereof as acaricides and/or insecticides for controlling animal pests and to processes and intermediates for the preparation thereof.
METHODS FOR MAKING CENTRAL NERVOUS SYSTEM AGENTS THAT ARE TRPV1 ANTAGONISTS
申请人:Lukin Kirill A.
公开号:US20100016611A1
公开(公告)日:2010-01-21
The invention discloses compounds of formula II:
and methods of making the compounds, which are VR
1
antagonists that are useful in treating pain, inflammatory thermal hyperalgesia, urinary incontinence and bladder overactivity.
Process Development for a 1<i>H</i>-Indazole Synthesis Using an Intramolecular Ullmann-Type Reaction
作者:Jon I. Day、Katherine N. Allen-Moyer、Kevin P. Cole
DOI:10.1021/acs.joc.2c02771
日期:——
takes advantage of an electronically directed metalation/formylation sequence followed by condensation with methyl hydrazine to form a hydrazone and culminates in a copper-catalyzed intramolecular Ullmann cyclization. The Ullmann reaction was plagued with difficulties ranging from poor reactivity to thermal hazard concerns, but use of high-throughput screening, statistical modeling, and an unusual isolation