Mass spectra of new heterocycles: X. Fragmentation of the molecular ions of 1-alkyl(cycloalkyl, aryl)-3-alkoxy(aryl)-2-methylsulfanyl-1H-pyrroles
作者:L. V. Klyba、N. A. Nedolya、O. A. Tarasova、E. R. Zhanchipova、O. G. Volostnykh
DOI:10.1134/s1070428010070134
日期:2010.7
The mass spectra of previously unknown 1-alkyl(cycloalkyl, aryl)-3-alkoxy(aryl)-2-methylsulfanyl-1H-pyrroles were studied. Fragmentation of all 3-alkoxy-substituted pyrroles under electron impact (70 eV) follow both ether and sulfide decomposition paths; In particular, 1-R-substituted 3-methoxy-2-methylsulfanyl-1H-pyrroles (R = Me, Et, i-Pr, s-Bu, cyclo-C5H9, cyclo-C6H11, Ph) lose methyl radical group
研究了以前未知的1-烷基(环烷基,芳基)-3-烷氧基(芳基)-2-甲基硫基-1 H-吡咯的质谱。所有3-烷氧基取代的吡咯在电子轰击(70 eV)下的裂解均遵循醚和硫化物的分解路径。特别是1-R-取代的3-甲氧基-2-甲基硫烷基-1 H-吡咯(R = Me,Et,i- Pr,s- Bu,环-C 5 H 9,环-C 6 H 11,Ph )从甲氧基和甲基硫烷基基团失去甲基基团。1秒的质谱丁基和1环烷基吡咯也有一个强峰(10-49%),该峰来自通过同步氢转移裂解NR键形成的奇电子[ M C n H 2 n ] +·离子。3-烷氧基-1-异丙基-2-甲基硫烷基-1 H-吡咯(Alk = Et,i -Pr,t -Bu)断裂中的O-Alk键断裂伴随重排过程,导致相应的烯烃和1-电子的1-异丙基-2-甲基硫烷基-1 H-吡咯-3-醇离子。1-烷基-2-甲基硫烷基-3-苯基-1 H-吡咯的主要裂解途径(Alk