Process for preparing 2,4,5-trisubstituted imidazoles from N-acylated alpha-amino nitriles
申请人:——
公开号:US20040267026A1
公开(公告)日:2004-12-30
The invention is a process for preparing an imidazole of formula I
1
which comprises treating an N-acylated &agr;-amino nitrile with a phosphine and a carbon tetrahalide of the formula CX
4
, wherein X is Cl or Br, to form a haloimidazole of the formula
2
wherein
R
1
is selected from the group consisting of hydrogen, C
1-6
alkyl, —CH
2
-aryl, and aryl; and
R
2
is selected from the group consisting of hydrogen, C
1-6
alkyl, —CH
2
—O-aryl and aryl; and
X is selected from the group consisting of Cl and Br.
New Method for the Synthesis of Diversely Functionalized Imidazoles from N-Acylated α-Aminonitriles
作者:Yong-Li Zhong、Jaemoon Lee、Robert A. Reamer、David Askin
DOI:10.1021/ol036423y
日期:2004.3.1
[reaction: see text] A new general method for the synthesis of medicinally important diversely functionalized imidazoles from N-acylated alpha-aminonitriles has been developed. N-Acylated alpha-aminonitriles were reacted with triphenylphosphine and carbon tetrahalide to afford 2,4-disubstituted 5-halo-1H-imidazoles in good yield. This new methodology was applied for the synthesis of 2-butyl-4-chloro-