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Cyclopropane-shift type reaction of diaryl(2-halogenocyclopropyl)methanols promoted by Lewis acids

✍ Scribed by Kazunori Wakasugi; Yoshinori Nishii; Yoo Tanabe

Book ID
104210615
Publisher
Elsevier Science
Year
2000
Tongue
French
Weight
229 KB
Volume
41
Category
Article
ISSN
0040-4039

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✦ Synopsis

Novel cyclopropane-shift type reaction of diaryl(2-halogenocyclopropyl)methanols 2b and 7 proceeded by using BF 3 . OEt 2 and TiCl 4 , respectively. Utilizing these reactions, 1-aryl-3-chloro-1,2-methanoindans 5 and 9, 1-aryl-3-methylnaphthalenes 6, and 1,2-methano-1-arylindens 10 were constructed.

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Lewis acid - promoted cyclopropanation o
Lewis acid - promoted cyclopropanation of Ξ±,Ξ²-unsaturated carbonyl compounds by diazocarbonyl compounds. A facile synthesis of 1,2-disubstituted cyclopropylcarbonyl compounds of high isomeric purity
✍ Michael P. Doyle; William E. Buhro; Joseph F. Dellaria Jr. πŸ“‚ Article πŸ“… 1979 πŸ› Elsevier Science 🌐 French βš– 293 KB

## Antimony pentafluoride promotes condensation of a,&unsaturated aldehydes ad ketones with diuzocarbony2 compowzds to form I,%disubstituted cycZopropyZcarbony2 compounds in preparativeZy useful yields. ## Isomerization of the cycZopropyba.rbonyt derivative by antimony pentaf'luoride produces the