[EN] AGENT FOR PREVENTING OR TREATING NEUROPATHY<br/>[FR] AGENT POUR LA PRÉVENTION OU LE TRAITEMENT DE NEUROPATHIE
申请人:TAKEDA CHEMICAL INDUSTRIES LTD
公开号:WO2004039365A1
公开(公告)日:2004-05-13
The present invention provides an agent for preventing or treating neuropathy having superior action and low toxicity. This agent comprises a compound represented by the formula:wherein ring A is a 5-membered aromatic heterocycle containing 2 or more nitrogen atoms, which may further have substituent(s);B is an optionally substituted hydrocarbon group or an optionally substituted heterocyclic group;X is a divalent acyclic hydrocarbon group;Z is -O-, -S-, -NR2-, -CONR2- or -NR2CO- (R2 is a hydrogen atom or an optionally substituted alkyl group);Y is a bond or a divalent acyclic hydrocarbon group;R1 is an optionally substituted cyclic group, an optionally substituted amino group or an optionally substituted acyl group, provided that when the 5-membered aromatic heterocycle represented by ring A is imidazole, then Z should not be -O-, or a salt thereof.
An efficient and ligand‐free palladium‐catalyzed arylation of benzofurans has been developed with N′ ‐acyl arylhydrazines as the coupling partners. This protocol features a wide functional‐group tolerance and highly regioselective products.
A novel ligand-free palladium/copper-catalyzed Heck-type coupling reaction of alkenes and N′-acyl arylhydrazines has been developed by using air as the terminal oxidant. This protocol features wide functional group tolerance and produces highly chemoselective and regioselective products with good to excellent yields.
Reactions of mercury(II) acetate with nitrogen compounds. Part 9. Oxidations of the bis-(4-nitrophenylhydrazone)s of some 1,3-diketones with mercury(II) acetate and lead(IV) acetate
作者:Richard N. Butler、John P. James
DOI:10.1039/p19820000553
日期:——
Oxidation of bis-(4-nitrophenylhydrazone)s of 1,3-diketones containing an α-CH between the hydrazone chains resulted in cyclisation with fragmentation, giving pyrazoles. The reaction is considered to involve dehydrogenation of the conjugated tautomeric enamine form of the bis-hydrazone, giving a cis-azo-hydrazonoalkene intermediate. When the postulated azo-hydrazonoalkene intermediate had trans-stereochemistry
Preparation, properties, and reductive alkylation of arylhydrazides
作者:Giancarlo Verardo、Nicoletta Toniutti、Angelo G Giumanini
DOI:10.1139/v98-125
日期:1998.8.1
1-Acyl-2-arylhydrazines (1), readily obtained in high yield from the condensation of arylhydrazines and the appropriate liquid carboxylic acid (2), underwent reductivealkylation with the same or d...