Strategy to Construct Stair-Shaped Partially Reduced Naphtho[1,2-b]pyrano[2,3-d]oxepines and Dinaphtho[1,2-b,d]oxepines
作者:Sanjay K. Gautam、Hardesh K. Maurya、Ramendra Pratap、Brijesh Kumar、Abhinav Kumar、Vishnu K. Tandon、Vishnu Ji Ram
DOI:10.1002/jhet.2342
日期:2016.11
2‐b]pyran[2,3‐d]oxepine‐3‐carbonitriles (4). Reaction of 3 with aryl methyl ketone (5) in DMSO at room temperature using powdered KOH as a base produced stair‐shaped 5‐aryl‐7,8‐dihydro‐1,4‐dioxa‐2,3‐dioxodinaphtho[1,2‐b,d]oxepine (6) in good yields. However, reaction of 6‐aryl‐2H‐pyran‐2‐one‐3‐carbonitrile (8) with 3,4‐dihydronaphtho[1,2‐b]oxepin‐5(2H)‐one (1) did not give similar product, but in lieu 4‐aryl‐5
简明高效的碱诱导的阶梯状4-甲硫基-2-氧代-5,6-二氢-2 H-萘[1,2-b]吡喃[2,3 - d ]氧杂环丁烷-3-的合成在粉末状二甲基亚砜中,通过3,4-二氢萘[1,2-b]氧杂环戊酸酯-5(2 H)-one(1)和甲基2-氰基-3-3,3-二甲基硫代丙烯酸酯的反应来描绘腈(3)室温下以KOH为碱。通过与仲胺在乙醇中在回流温度下反应,可实现3氨基化,从而产生4 sec-氨基-2-氧代-5,6-二氢-2 H-萘[1,2- b ]吡喃[2,3 ‐ d ]奥沙平-3腈(4)。反应3在室温下,以粉状KOH为基础,在DMSO中用芳基甲基酮(5)制备楼梯形的5-芳基-7,8-二氢-1,4-二氧杂-2-3,3-二氧杂萘并[1,2- b],d ]奥西平(6),收率高。但是,6芳基-2 H吡喃-2- 1-3-腈(8)与3,4-二氢萘并[1,2 - b ] oxepin-5(2 H)-1(1)的反应