## Abstract ChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 100 leading journals. To access a ChemInform Abstract of an article which was published elsewhere, please select a “Full Text” option. The original article is trackable v
On the ring-contraction of 1,4-dithiins to 1,3-dithiole derivatives
✍ Scribed by Raquel Andreu; Javier Garı́n; Jesús Orduna; José M Royo
- Publisher
- Elsevier Science
- Year
- 2001
- Tongue
- French
- Weight
- 62 KB
- Volume
- 42
- Category
- Article
- ISSN
- 0040-4039
No coin nor oath required. For personal study only.
✦ Synopsis
The effect of different factors (pK a of the base, nature of the counterion and dissociation of the ion pairs) on the course of the base-induced rearrangement of 1,4-dithiins to 1,3-dithiole derivatives is discussed. Ab initio calculations account for the driving force of these isomerisations.
📜 SIMILAR VOLUMES
## Abstract ChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 100 leading journals. To access a ChemInform Abstract of an article which was published elsewhere, please select a “Full Text” option. The original article is trackable v
## Synthesis a b s t r a c t A series of mono-substituted and bis-substituted derivatives of thieno [3,4-d]-1,3-dithiol-2-one were prepared through halogenation, chloromethylation, and subsequent nucleophilic substitution reactions. Compounds were characterized by NMR, FT-IR, and HRMS.
Oxidation of the title compounds, in contrast to that of ''normal'' (Z,Z)-buta-1,3-diene-1,4-dithiolates, does not lead to the formation of 1,2-dithiins. Thus, the aliphatic diaminodithiolates 7 and 8 were converted into the (E)-2-butenedithioamides 12 and 15 as a result of resonance stabilization o
The reoent publication of several aomwnicationa regarding the preparation and properties of a 3-hydroxy-l-pyraaoline (1) and other qrclic and acyclic o-bydroxyalkyldiazenes (2) prompts us to report the preparation of a new group of compounds (V) containing a 3-hydroxy-1-pgmsolne structure which, unl