𝔖 Bobbio Scriptorium
✦   LIBER   ✦

Mass spectrometry and pyrolytic decomposition of 2-amino-3′,4′,6-trisubstituted isoflavones

✍ Scribed by Peifeng Hu; Yongfu Li; Yongquan Lu; Kalevi Pihlaja

Book ID
102559509
Publisher
John Wiley and Sons
Year
1993
Tongue
English
Weight
290 KB
Volume
28
Category
Article
ISSN
1076-5174

No coin nor oath required. For personal study only.

✦ Synopsis

The 2-aminoisoflavones studied exhibited some familiar fragmentation pathways, such as the formation of the retro-Diels-Alder ions. However, substitutions at C(2), C(3'), C(4') and C(6) induced some specific decompositions of both mass spectrometric and pyrolytic origin. Pyrolytic decompositions reverse to the Mannich reaction occurred with all compounds to variable extents. The three compounds with the (Me),NSO, substitution at C(6) exhibited another type of pyrolytic reaction, namely the formation of products corresponding to ions of m/z 272, 300 and 314, depending on the type of substitution at C(3'). The occurrence of an interesting 'ortho effect', the elimination of the elements of CH,O from C(3') and C(4'), was also established.

📜 SIMILAR VOLUMES

Mass spectrometry of pyrimidine derivati
Mass spectrometry of pyrimidine derivatives: Electron impact-induced decomposition of molecular ions of 4-amino-substituted and 4-amino-disubstituted 1,2-dihydro-1-methylpyrimidin-2-ones
✍ Adam S. Plaziak; Lech Celewicz; Krzystof Ciszewski; Krzysztof Golankiewicz 📂 Article 📅 1991 🏛 John Wiley and Sons 🌐 English ⚖ 365 KB

Electron impact (El) mass spectra of fourteen Qamino-substituted 1,2aihydro-l-methylpyrimidibZoaes are reported. The EI-induced decomposition of their molecular ions is significantly dependent on the chemical nature of the substitwnts. The routes of mass decomposition established suggest the presenc

Mass spectrometry of 2-substituted-4-ary
Mass spectrometry of 2-substituted-4-arylthiazoles. 3—identification of microsomal nitroreduction products by mass spectrometry
✍ Michael B. Mattammal; Terry V. Zenser; Bernard B. Davis; Wdward V. White 📂 Article 📅 1984 🏛 John Wiley and Sons 🌐 English ⚖ 487 KB 👁 1 views

The electron impact mass spectra of the chemical carcinogens 4-(4-nitrophenyl)-2-methylaminothiazole, 4-(4aminophenyl)-2-methylaminothiazole and 4-(4-aminophenyl)-2-aminothiazole were studied. The 4-(4-aminophenyl)-2-substituted thiazoles were isolated from the anaerobic microsomal reduction of thei