Sulfamic Acid as an Effective Catalyst in Solvent‐Free Synthesis of β‐Enaminoketone Derivatives and X‐ray Crystallography of Their Representatives
作者:Min Xia、Bin Wu、Guo‐Feng Xiang
DOI:10.1080/00397910701873250
日期:2008.3.28
Abstract Two types of β‐enaminoketone derivatives of 3‐(2‐oxo‐2‐arylethylidene)‐3,4‐dihydro‐1H‐quinoxalin‐2‐ones and 3‐(2‐oxo‐2‐arylethylidene)‐3,4‐dihydro‐benzo[1,4]oxazin‐2‐ ones were effectively and conveniently prepared in good to excellent yields under solvent‐free conditions via the catalysis of sulfamic acid in the corresponding condensations of o‐phenylenediamine and o‐aminophenol with ethyl
摘要 3-(2-oxo-2-arylethylidene)-3,4-dihydro-1H-quinoxalin-2-ones和3-(2-oxo-2-arylethylidene)-3,4的两种β-烯氨基酮衍生物在无溶剂条件下,通过氨基磺酸催化邻苯二胺和邻氨基苯酚与乙基 2 的相应缩合反应,可以有效且方便地制备-二氢苯并[1,4]恶嗪-2-类化合物。 ,4-dioxo-4-arylbutyrate 分别。化合物经 IR、1H NMR 和 13C NMR 确证,代表性化合物通过 X 射线晶体学进一步确定。