✦ LIBER ✦
Improved procedure for the generation of allyl cations from simple dibromo ketones. Change of mechanism on reaction with triethyl borate amd zinc. Cycloadditions to conjugated dienes.
✍ Scribed by H.M.R. Hoffmann; M.N. Iqbal
- Publisher
- Elsevier Science
- Year
- 1975
- Tongue
- French
- Weight
- 254 KB
- Volume
- 16
- Category
- Article
- ISSN
- 0040-4039
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✦ Synopsis
Several techniques are now avallable for generatlng ally1 cations as reactive lntermedlates n of var~.ous cycloaddltlons. In addltlon to the sliver salt route' which has permitted the preparation of blcyclo[3.2.21nona-6,8-dlen-3-one from benzene and the 2-methoxyallyl catlon2, one may use c,c. -dlhalo ketones In comblnatlon wvlth suitable reducing agents such as alnccopper couple 3 nonacarbonyldl-iron 4