Chemical Reactivity of 4,9-Dimethoxy-5-oxo-5<i>H</i>-furo[3,2-<i>g</i>]chromene-6-Carboxaldehyde Toward Some Nucleophilic Reagents
作者:Nasser M. El-Gohary、Magdy A. Ibrahim、Eslam R. El-Sawy、Noura A. Abdel-fatah
DOI:10.1002/jhet.2733
日期:2017.3
pyrimidine, [1,2,4]triazolo[4,3‐a]pyrimidine, tetrazolo[1,5‐a]pyrimidine, and diazepine derivatives linked benzofuran were efficiently synthesized. Reaction of carboxaldehyde 1 with a variety of 1,4‐binucleophiles produced furochromone‐fused benzodiazepine, pyridotriazepine, benzoxazepine, and benzothiazepine derivatives. Some unsymmetrical thiocarbohydrazones were also synthesized. Structures of the new synthesized
研究了4,9-二甲氧基-5-氧代-5 H-呋喃[3,2 - g ]色烯-6-甲醛(6-甲酰基khellin)(1)的化学反应性,涉及多种氮亲核试剂。甲醛1与某些伯胺和杂环胺的反应得到相应的席夫碱。此外,还研究了甲醛1对某些肼衍生物的反应性,即7-氯-4-肼基喹啉,3-肼基-5,6-二苯基-1,2,4-三嗪,N 4-苯基硫代氨基脲和S-苄基二硫代咔唑。6‐甲酰基khellin(1)经盐酸羟胺处理后发生环转化,生成5-羟基-4,9-二甲氧基-7-氧代-7 H-呋喃[3,2 - g ]色烯-6-腈(22)。有效地合成了一些嘧啶,[1,2,4]三唑并[4,3- a ]嘧啶,四唑并[1,5- a ]嘧啶和二氮杂衍生物连接的苯并呋喃。甲醛1与各种1,4-双亲核试剂的反应产生了呋喃色酮稠合的苯并二氮杂pine,吡啶并三氮杂,、苯并x氮pine和苯并氮th衍生物。还合成了一些不对称的硫代碳酰肼。根据新合成产物的分析和光谱数据推导其结构。