Influence of electron-withdrawing N-1 substituents on the thermal behaviour of 5-azido-1,2,3-triazoles
作者:Gerrit L'abbé、Linda Beenaerts
DOI:10.1016/0040-4020(89)80105-x
日期:1989.1
corresponding azides by the diazotization method, but the diazo transfer on the conjugate bases with tosyl azide proceeds smoothly and was used in this work as a general method to obtain the azides . The latter thermolyze by two different pathways, depending on the nature of the R4-substituent; i.e. rearrangement to diazoester substituted tetrazoles when R4 = COOR, and decomposition to alkylidenetriazenes
具有强吸电子N-1取代基的5-氨基-1,2,3-三唑()无法通过重氮化方法转化为相应的叠氮化物,但重氮与甲苯磺酰基叠氮化物在共轭碱上的转移很顺利并在这项工作中被用作获得叠氮化物的一般方法。取决于R 4-取代基的性质,后者通过两种不同的途径进行热解。即当R 4 = COOR时重排为重氮酯取代的四唑,而当R 4 = Ar时分解为亚烷基十二烷。重氮酸酯可以在苯中进一步热解为正二十烷,或在腈溶液中热解为咪唑四唑和。重排的动力学⇄在50℃下在不同溶剂中进行了讨论。