Synthesis of Substituted Benzoxazolinones by the Curtius Rearrangement: Crystal Structures of Intermediates and By-Products
作者:Gerhard Laus、Volker Kahlenberg、Klaus Wurst、Sven Nerdinger、Herwig Schottenberger
DOI:10.1515/znb-2011-0507
日期:2011.5.1
3-Substituted salicyloyl chlorides were converted to salicyloyl azides (R = Br, NO2) which underwent thermal rearrangement and intramolecular cyclization to benzoxazolinones. The crystal structures of 7-substituted benz[d]oxazolin-2-ones (R = Br, NH2), intermediate salicyloyl azides and byproducts, i. e. 3-(2-hydroxy-3-nitrophenyl)-8-nitrobenz[e][1,3]oxazine-2,4-dione and 2-hydroxy-N- (2-hydroxy-3
3-取代的水杨酰氯转化为水杨酰叠氮化物(R = Br,NO2),其经历热重排和分子内环化成苯并恶唑啉酮。7-取代苯并[d]恶唑啉-2-酮(R = Br, NH2)、中间体水杨酰叠氮化物和副产物的晶体结构,即3-(2-羟基-3-硝基苯基)-8-硝基苯[e][ 1,3]恶嗪-2,4-二酮和2-羟基-N-(2-羟基-3-硝基苯基)-3-硝基苯甲酰胺已被测定。7-氨基苯并恶唑啉酮是通过催化氢化半水合物或无水形式的硝基化合物获得的,这取决于结晶的温度图形摘要通过库尔蒂斯重排合成取代的苯并恶唑啉酮:中间体和副产物的晶体结构