๐”– Bobbio Scriptorium
โœฆ   LIBER   โœฆ

Cycloaromatization of bridged diallenes: Mechanistic study

โœ Scribed by S. Braverman; Y. Duar


Book ID
104245637
Publisher
Elsevier Science
Year
1978
Tongue
French
Weight
192 KB
Volume
19
Category
Article
ISSN
0040-4039

No coin nor oath required. For personal study only.

โœฆ Synopsis


Recently, we have reported on the cycloaromatisation of several bridged diallenic systems, l_, 3, 7. 1 This previous work, -as well as the present one, concern bridged diallenes in which the bridge contributes an aromatic character, and consequently an extra driving force for the cyclization. The methyl substituents give rise to a possibility of an ene reaction , which does not exist in the case of the unsubstituted


๐Ÿ“œ SIMILAR VOLUMES


Cycloaromatization and cyclodimerization
โœ S. Braverman; Y. Duar; D. Segev ๐Ÿ“‚ Article ๐Ÿ“… 1976 ๐Ÿ› Elsevier Science ๐ŸŒ French โš– 262 KB

Recently, we have shown that bis-y,y-dimethylallenyl sulfone (J) undergoes a novel and facile cyclization on heating at 75O to 3-isopropcnyl-4-isopropylthiophene l,l-dioxide (2)2. The reaction mechanism may either involve a 2,2 '-bisallyl-type biradical intermediate or may be described as a concerte

Cycloaromatization of Open and Masked 1,
โœ Gerhard Zimmermann ๐Ÿ“‚ Article ๐Ÿ“… 2001 ๐Ÿ› John Wiley and Sons ๐ŸŒ English โš– 592 KB

The discovery of the net-cyclization of 1,3-hexadien-5-yne to benzene at temperatures around 250 ยฐC was followed, particularly during the 1990s, by an increasing number of investigations of the ability of other compounds possessing a 1,3-hexadien-5-yne substructure to cycloaromatize. This has led to