Competing polar cycloreversion reactions under electron impact ionization in 3,4-dihydro-1,3,2-oxazaphosphorin-2-oxides
β Scribed by P. S. Kulkarni; S. D. Sahasrabudhe; B. D. Tilak
- Publisher
- John Wiley and Sons
- Year
- 1987
- Tongue
- English
- Weight
- 325 KB
- Volume
- 22
- Category
- Article
- ISSN
- 1076-5174
No coin nor oath required. For personal study only.
π SIMILAR VOLUMES
## Abstract A cycloreversal reaction, leading to aroyl cations, is the major process in 2βarylβ4__H__β3,1βbenzoxazinβ4βones under electron impact conditions. The __ortho__ interaction of the methoxy and the nitro groups in the 2βphenyl moieties in these compounds present the most abundant ions at _
The electron impact mass spectra of 2,4,5,5-tetrasubstitted 1,2,4triazolidine-3thiones exhibited, in addition to four main routes of fragmentation, a reaction leading to the formation of ~alkyl-l,2,Qtriazoline-3-thiows via an elimination of HR4 (R' < R4 are the substituents at C(5)) or via a McLaffe