German workers' have repcrted recently that the reaction of 3,4-dichlorc-1,2-bensisothiasole with sodium alkcxides or with secondary smines gives the expected nucleophilic substitution product, together with small amounts of material formed by fission of the isothiaeole ring.
Labelling studies of the ring opening of 1-bromo-2-chloro-3,3-dimethylcyclopropene
✍ Scribed by Mark S. Baird
- Publisher
- Elsevier Science
- Year
- 1984
- Tongue
- French
- Weight
- 210 KB
- Volume
- 25
- Category
- Article
- ISSN
- 0040-4039
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✦ Synopsis
upon Tyne , Newcastle upon Vne , NE1 7RU. 1-Bromo-2-chloro-3,3-dimethylcyclopropene reacts with methyl lithium in the presence of 2,3_dimethylbut-2-ene at above -7OOC to give (4); 12 C labelling shows that C-2 of the cyclopropane becomes the centre carbon of the allene.
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Rate constants, k, were determined for the solvolytic reactions of 2-bromo-2-methylbutane, 2-chloro-2methylbutane and 3-chloro-3-methylpentane in 10 pure diols at 298.15 K. The Gibbs energies of activation were calculated in order to study the influence of the solvent and to provide mechanistic info
## Abstract A convenient procedure has been developed for the synthesis of ^14^C‐3‐chloropropan‐1, 2‐diol (α‐chlorohydrin, **I**) from ^14^C‐glycerol which can also be applied to the preparation of ^14^C‐3‐bromopropan‐1, 2‐diol (α‐bromohydrin, **III**). These two compounds can be converted, respect