𝔖 Bobbio Scriptorium
✦   LIBER   ✦

The electron impact-induced cyclization of o-carboxy- and o-carboxamidocyclopropylbenzenes

✍ Scribed by Albert T. Lebedev; Tatyana N. Alekseeva; Tatyana G. Kutateladze; Sergey S. Mochalov; Yury S. Shabarov; Valery S. Petrosyan

Publisher
John Wiley and Sons
Year
1989
Tongue
English
Weight
398 KB
Volume
24
Category
Article
ISSN
1076-5174

No coin nor oath required. For personal study only.

✦ Synopsis

The isomerization of M + ' of o-carboxy-and o-carboxamidocyclopropylbenzenes into five-and six-membered heterocycles due to the ortho effect has been demonstrated by means of electron impact mass spectra, high-resolution mass spectrometry data and metastable ion spectra. The criteria for the quantitative estimation of the degree of cyclopropane cyclization into these isomeric cycles were formulated. The nature and quantity of heterocyclic ions proved to be in good accord with the results for cyclization of the same cyclopropanes in the strong acid solutions.

📜 SIMILAR VOLUMES

Electron-impact-induced Ortho effects in
Electron-impact-induced Ortho effects in (O-carboxyphenyl)diphenylphosphine
✍ R. Srinivas; G. K. Viswanadha Rao; V. Ravinder 📂 Article 📅 1993 🏛 John Wiley and Sons 🌐 English ⚖ 255 KB

## Abstract Proximity effects of the carboxyl group with the phosphorus atom in the molecular ion of (__o__‐carboxyphenyl)diphenylphosphine (1) leads to the loss of ĊHO to form the base peak at __m__/__z__ 277, which is totally absent in the (__m__‐ and __p__‐carboxyphenyl)diphenylphosphines. The m

Electron impact induced cyclization of o
Electron impact induced cyclization of ortho-substituted diphenylmethanes
✍ Joachim G. Liehr; A. Gareth Brenton; John H. Beynon; Wilhelm J. Richter 📂 Article 📅 1981 🏛 John Wiley and Sons 🌐 English ⚖ 495 KB

## Abstract Mass spectra of 2‐hydroxydiphenylmethane and its derivatives are characterized in the upper mass region by an abundant ion __m__/__z__ 165. Metastable ion measurements reveal that this ion is formed from the molecular ion of the parent compound by elimination of H~2~O and hydrogen. A fl

Observations on the electron impact indu
Observations on the electron impact induced fragmentation of methyl and phenyl 4,6-O-Benzylideneglucopyranosides
✍ N. Kyriakidis; T. C. Smale; E. S. Waight 📂 Article 📅 1979 🏛 John Wiley and Sons 🌐 English ⚖ 393 KB

## Abstract The structure of some rearrangement ions in the electron impact induced fragmentation of methyl 4,6‐__O__‐benzylidene‐2,3‐di‐__O__‐methyl‐α‐D‐glucopyranoside and phenyl 4,6‐__O__‐benzylidene‐2,3‐di‐__O__‐methyl‐β‐D‐glucopyranoside have been investigated using high resolution, deuterium