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.