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Addition reactions of the trichlorocyclopropenylium ion with alkenes: A novel access to cyclopropene and cyclopropenone derivatives

✍ Scribed by Klaus Musigmann; Herbert Mayr; Armin de Meijere


Publisher
Elsevier Science
Year
1987
Tongue
French
Weight
230 KB
Volume
28
Category
Article
ISSN
0040-4039

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πŸ“œ SIMILAR VOLUMES


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## The 2-chloro-3-(2'~chloroalkyl)cyclopropenones 4, readily obtained by hydrolysis of the adducts of the m'chlorocyclopropenylium ion onto alkenes, thermally rearrange to propiolic acid chlorides 6. Treatment of 4 with TosOHJ+O in CH,Cl, yields the (E)-3-chloro-2-(2'-chloroalkyl)acrylic acids 9, wh

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## Abstract The lithium diphenylphosphonium di(methylide) Ph~2~ P(CH~2~)~2~ Li __1__ readily attacks cyclic carbonates, carbamates, and thiocarbamates, resulting in β€œpseudo‐acylation” products, after a ring‐opening step. Thus, new stabilized ylides are prepared, which can be used in situ as carbony