✦ LIBER ✦

Automerization on [4.2.2]propella-2,4,7,9-tetraene system

✍ Scribed by Takashi Tsuji; Shinya Nishida

Book ID: 104217086
Publisher: Elsevier Science
Year: 1983
Tongue: French
Weight: 280 KB
Volume: 24
Category: Article
ISSN: 0040-4039
DOI: 10.1016/s0040-4039(00)81632-9

No coin nor oath required. For personal study only.

✦ Synopsis

7-[4.2.2]Propella-2,4,7,9_tetraenecarboxylates, A, when heated at 200°, undergo reversible automerization giving 2 in preference to the aromatization to naphthalene derivatives which is promoted by free radicals. In a recent communication, 1 we have reported the synthesis of methyl 7-[4.2.2]propella-2,4,7,9_tetraenecarboxylate, &. During the subsequent investigation on the chemical behavior of I&,, we observed that h underwent a novel automerization when heated at 200' in solution. Valence isomerization of unsaturated polycyclic compounds has been a subject of much attention and studied

📜 SIMILAR VOLUMES

Propellanes. XII. Irontricarbonyl deriva

Propellanes. XII. Irontricarbonyl derivatives of 12-oxa[4.4.3]propella-2,4,7,9-tetraene

✍ Karin Bj»mer Birnbaum; J. Altman; T. Maymon; D. Ginsburg 📂 Article 📅 1970 🏛 Elsevier Science 🌐 French ⚖ 173 KB

Refluxing the tetraenic ether 1. with diironnonacarbonyl in benzene solution for 24 hr in a nitrogen atmosphere afforded five organometallic derivatives.1 The nmr spectrum of one of these, m.p. 200-204°C, suggested that this was a symmetrical bis-irontricarbonyl derivative of 1, of structure 1 or 2.

Synthese von bicyclo[4.2.2]Deca-2,4,7,9-

Synthese von bicyclo[4.2.2]Deca-2,4,7,9-tetraen

✍ H.-P. Löffler 📂 Article 📅 1974 🏛 Elsevier Science 🌐 French ⚖ 130 KB

received in UK for publioation 25 Jv 1974) Bicyclo[4.2.2]deca-2,4,7,9\_tetraen (1,) als Vertreter der (CH),O-Kohlenwasserstoffe' wurde in praparativen Mengen bislang durch Umlagerung von Bullvalen mit Schwermetallsalzen 293 oder ausgehend vom Dianion des Cyclooctatetraens 4 synthetisiert.

Valence isomerization in the bicyclo[4.2

Valence isomerization in the bicyclo[4.2.2]Deca-2,4,7,9-tetraene system

✍ John S. McConaghy Jr.; Jordan J. Bloomfield 📂 Article 📅 1969 🏛 Elsevier Science 🌐 French ⚖ 172 KB

.alpha.-Halo sulfones. XIV. [4.4.2]Prope

.alpha.-Halo sulfones. XIV. [4.4.2]Propella-2,4,7,9,11-pentaene

✍ Paquette, Leo A.; Philips, J. Christopher 📂 Article 📅 1969 🏛 American Chemical Society 🌐 English ⚖ 245 KB

[4.2.2]Propella-3,7-diene

✍ Paquette, Leo A.; Houser, Robert W. 📂 Article 📅 1971 🏛 American Chemical Society 🌐 English ⚖ 670 KB

Thermal isomerization of bicyclo[4.2.2]d

Thermal isomerization of bicyclo[4.2.2]deca-2,4,7,9-tetraene

✍ Maitland Jones Jr.; Billy Fairless 📂 Article 📅 1968 🏛 Elsevier Science 🌐 French ⚖ 176 KB

CENTRAL to the consideration of mechanism in many of the transformations of molecules of the formula (CH),, has been tetracyclo[4.4.0.02"0 .05"]deca-3,8-diene (I).3a-g We describe here a degenerate isomerization of bicyclo-[4.?.2]deca-2,4,7,9-tetraene (II) which most strongly implicates I as an inte