✦ LIBER ✦
Dimethylsulfonio- and sulfo-de-hydrogenation on reaction of azuleno[2,1,8-ija]azulene (isopyrene) with the dimethyl sulfoxide-sulfur trioxide complex as reagent
✍ Scribed by Hans Cerfontain; Ankie Koeberg-Telder; Emanuel Vogel; Oswald Wilmes
- Publisher
- Elsevier Science
- Year
- 2010
- Tongue
- English
- Weight
- 323 KB
- Volume
- 113
- Category
- Article
- ISSN
- 0165-0513
No coin nor oath required. For personal study only.
✦ Synopsis
Abstract
Reaction of azuleno[2,1,8‐ija]azulene (isopyrene, 1) with SO~3~ in the presence of an excess of DMSO leads mainly to mono‐“dimethylsulfonio‐de‐hydrogenation” with formation of 5‐(dimethylsulfonio)isopyrene, the amount of initial sulfonation being relatively small. Subsequently, the 5‐(dimethylsulfonio)isopyrene is relatively slowly sulfo‐de‐hydrogenated to yield 5‐(dimethylsulfonio)isopyrene‐10‐sulfonic acid.