Three-component couplingreactions of 2-(cyanomethyl)phenol, aryl halides, and carbon monoxide (CO) in orthogonal–tandem catalysis were investigated. In the reactions, 2-(cyanomethyl)phenyl esters, which are produced through Pd(PPh3)4-catalyzed alkoxycarbonylation of aryl halides with 2-(cyanomethyl)phenol, undergo cycloisomerization in situ catalyzed by Pd(PCy3)2 as a co-catalyst to give 3-acyl-2-aminobenzofurans
A new route to 3-acyl-2-aminobenzofurans: palladium-catalysed cycloisomerisation of 2-(cyanomethyl)phenyl esters
作者:Masahito Murai、Koji Miki、Kouichi Ohe
DOI:10.1039/b904127c
日期:——
Treatment of 2-(cyanomethyl)phenyl esters with a catalytic amount of Pd(OAc)(2), PCy(3), and Zn afforded 3-acyl-2-aminobenzofuran derivatives in good to excellent yields, which can be used as building blocks for the synthesis of benzofuran fused heterocycles.
ALKANOIC ACID DERIVATIVES, PROCESS FOR THEIR PRODUCTION AND USE THEREOF
申请人:Takeda Pharmaceutical Company Limited
公开号:EP1357115B1
公开(公告)日:2009-06-17
Alkanoic acid derivatives process for their production and use thereof
申请人:——
公开号:US20040058965A1
公开(公告)日:2004-03-25
An alkanoic acid derivative useful as a prophylactic or therapeutic agent of diabetes mellitus, hyperlipidemia, impaired glucose tolerance and the like can be provided by a compound represented by the formula
1
wherein R
1
is an optionally substituted 5-membered aromatic heterocyclic group; X is a bond and the like; Q is a divalent hydrocarbon group having 1 to 20 carbon atoms; Y is a bond and the like, ring A is an aromatic ring optionally further having 1 to 3 substituents; Z is —(CH
2
)
n
—Z
1
— (n is an integer of 1 to 8 and Z
1
is an oxygen atom and the like) and the like; ring B is a pyridine ring optionally further having 1 to 3 substituents, and the like; U is a bond and the like; W is a divalent hydrocarbon group having 1 to 20 carbon atoms; and R
3
is —OH and the like, provided that, when ring B is a benzene ring optionally further having 1 to 3 substituents, U should be a bond, or a salt thereof.