Absbuct -Cyclisations of various methyleaecyclqupyl suhstitmed makeate radicals have ken studied. Radicals dexived from makmama 4 and 9 nadavean exclusive S-exe cyclisaticn cab the methylerbxyclcpmpane Anne, followed by cpeaiag of the resulting cycloprq~ylmethyl mdicat, to 8ive methylenecyclohexane
Radical cyclisations of methylenecyclopropane derivatives
โ Scribed by Christine Destabel; Jeremy D Kilburn; John Knight
- Publisher
- Elsevier Science
- Year
- 1993
- Tongue
- French
- Weight
- 232 KB
- Volume
- 34
- Category
- Article
- ISSN
- 0040-4039
No coin nor oath required. For personal study only.
โฆ Synopsis
Radical cycliitions of various methylenecycbpopane derivatives have been stdied and it has been fotmd that methylenecyc~l pfopyl radicals undergo exclusive 5-cx0 cydhtion while methylenecycloppyl butyl mdicala give a mixtme of product9 resulting tium f&x0 and 7-efdo cyclisation. Attempted cyclisatioos of m*knecyclopropylptylmdicalskadston3hedpmductsonly.
๐ SIMILAR VOLUMES
The previously reported tandem cyclisation of N-aryl ฮฑ-(2cyanophenyl)sulfanyl imidoyl radicals affords one quinoxaline derivative arising from exclusive 1,6-cyclisation of the final iminyl radical onto the N-aryl ring. When the imidoyl radicals are generated by addition of photolytically generated (
The vinyl radicals 2a, 2b, and 11 each undergo fast exe ring closure to give 5a, 5b, and 12, the first two of which readily rearrange to ring-expanded radicals.