Acid-mediated Cyclization of 3-Benzoyl-2-cyanobutyronitrile to 2-Amino-4-methyl-5-phenylfuran-3-carbonitrile
摘要:
Cyclization of 3-benzoyl-2-cyanobutyronitrile to 2-amino-4-methyl-5-phenylfuran-3-carbonitrile was effected under acidic conditions, rather than the basic conditions previously reported. Since treatment with trifluoroacetic acid (TFA) at room temperature is very mild, 2-amino-4-methyl-5-phenylfuran-3-carbonitriles containing various functional groups can be accessed via this route.
Solvent-free reaction of substituted α-haloketones with malononitrile in the presence of diethylamine provides an efficient one-pot synthesis of 2-amino-5-aryl (alkyl)-3-furonitriles in high yield.
Cyclization of 3-benzoyl-2-cyanobutyronitrile to 2-amino-4-methyl-5-phenylfuran-3-carbonitrile was effected under acidic conditions, rather than the basic conditions previously reported. Since treatment with trifluoroacetic acid (TFA) at room temperature is very mild, 2-amino-4-methyl-5-phenylfuran-3-carbonitriles containing various functional groups can be accessed via this route.
First synthesis of 5,6-dihydro-4<i>H</i>-furo[3,2-<i>f</i>]pyrrolo- [1,2-<i>a</i>][1,4]diazepines
The synthetic pathway leading to 5,6-dihydro-4H-furo[3,2-f]pyrrolo[1,2-a][1,4]diazepines is described in four steps starting from α-bromophenones via 2-amino-3-furonitriles.
从α-溴苯酮经2-氨基开始的四个步骤描述了导致5,6-二氢-4 H-呋喃并[3,2- f ]吡咯并[1,2- a ] [1,4]二氮杂pathway的合成途径。-3-呋喃腈。