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Mass Spectra of New Heterocycles: XXI. Study of Alkyl [(5-Amino-1 H -pyrrol-2-yl)sulfanyl]acetates by Electron and Chemical Ionization Mass Spectrometry
Russian Journal of Organic Chemistry ( IF 0.8 ) Pub Date : 2020-06-26 , DOI: 10.1134/s1070428020050073 L. V. Klyba , N. A. Nedolya , E. R. Sanzheeva , O. A. Tarasova
中文翻译:
新杂环的质谱:XXI。电子和化学电离质谱研究烷基[(5-氨基-1 H-吡咯-2-基)硫烷基]乙酸酯
更新日期:2020-06-26
Russian Journal of Organic Chemistry ( IF 0.8 ) Pub Date : 2020-06-26 , DOI: 10.1134/s1070428020050073 L. V. Klyba , N. A. Nedolya , E. R. Sanzheeva , O. A. Tarasova
Abstract
The fragmentation of previously inaccessible alkyl [(5-amino-1H-pyrrol-2-yl)sulfanyl]acetates under electron (70 eV) and chemical (reactant gas methane) ionization conditions was studied for the first time. Under electron ionization, all the studied compounds form a molecular ion (Irel 7–100%), the main primary fragmentation pathway of which is associated with the C–S bond cleavage in the sulfanyl group and elimination of the ester fragment (R4OCOCH2) in the form of a radical. The chemical ionization of alkyl [(5-amino-1H-pyrrol-2-yl)sulfanyl]acetates is characterized by protonation, recharging, and electrophilic addition. The base peak belongs to an [M + H]+ ion. Chemical ionization is accompanied by the elimination of an R4OCOCH2 radical from the M+• and [M + Et]+ ions and an R4OCOCHS molecule from the M+• and [M + H]+ ions.中文翻译:
新杂环的质谱:XXI。电子和化学电离质谱研究烷基[(5-氨基-1 H-吡咯-2-基)硫烷基]乙酸酯