𝔖 Bobbio Scriptorium
✦   LIBER   ✦

Photochemical ring opening and true photo-oxidation in the 4A,4B-dihydrophenanthrenes

✍ Scribed by T. Knittel-Wismonsky; G. Fischer; E. Fischer


Book ID
104236858
Publisher
Elsevier Science
Year
1972
Tongue
French
Weight
170 KB
Volume
13
Category
Article
ISSN
0040-4039

No coin nor oath required. For personal study only.

✦ Synopsis


In an earlier paper' we drew attention to the possible existence of true photo-oxidation in the dihydrophenanthrenes (DHP's),


📜 SIMILAR VOLUMES


Energy Profiles for Ring Formation- and
✍ K. A. Muszkat; W. Schmidt 📂 Article 📅 1971 🏛 John Wiley and Sons 🌐 German ⚖ 685 KB

## Abstract An Extended __Hückel__ MO treatment of the system __cis__‐stilbene (I)‐4a, 4b‐dihydrophenanthrene (II) indicates that the concerted photocyclisation is a conrotatory process of the first excited electronic state. The activation energies for the photocyclisation and for the thermal ring

The Thermally and Photochemically Induce
✍ Günther Maier; Axel Bothur 📂 Article 📅 1998 🏛 John Wiley and Sons 🌐 English ⚖ 438 KB

The thermally induced ring opening of 1 and 5 proceeds with found, a behaviour that corresponds with the known photochemistry of cyclobutenes. A surprising reaction was high stereospecifity in a conrotatory fashion in agreement with the Woodward-Hoffmann rules. Upon flash pyrolysis of found if 1 and

ChemInform Abstract: Ring-Chain Transfor
✍ D. N. KOZHEVNIKOV; V. N. KOZHEVNIKOV; V. L. RUSINOV; O. N. CHUPAKHIN; E. O. SIDO 📂 Article 📅 2010 🏛 John Wiley and Sons ⚖ 36 KB 👁 1 views

Ring-Chain Transformation in the 4-Hydroxy-3,4-dihydro-1,2,4triazine Series and a Novel Method for the Synthesis of 1,2,4-Triazine-4-oxides. -Condensation of the hydrazones (I) with aldehydes or ketones (II) affords a tautomeric mixture (III)/(IV) of triazines. The ringchain transformation of these