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Propellanes. LXVII. Reactions of 1, 6-bridged [10]annulenes with 4-methyl-1,2,4-triazoline-3, 5-dione

✍ Scribed by Pnina Ashkenazi; Emanuel Vogel; David Ginsburg

Publisher
John Wiley and Sons
Year
1983
Tongue
German
Weight
287 KB
Volume
66
Category
Article
ISSN
0018-019X

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✦ Synopsis

Abstract

Reactions of 11‐substituted‐1, 6‐methano [10]annulenes and 1, 6‐methano [10]‐annulenes substituted in the aromatic ring with the title dienophile are described.

📜 SIMILAR VOLUMES

Propellanes. LXII. The endo- and exo-add
Propellanes. LXII. The endo- and exo-adducts of 11-cyano-1,6-methano[10] annulene with 4-methyl-1,2,4-triazoline-3,5-dione
✍ P. Ashkenazi; M. Kaftory; D. Arad; Y. Apeloig; D. Ginsburg 📂 Article 📅 1981 🏛 John Wiley and Sons 🌐 German ⚖ 174 KB

## Abstract The title compounds have been isolated and their structures determined by X‐ray crystallography. Their relative stability is discussed in terms of theory and experiment. The __endo__‐adduct is the thermodynamically more stable one.

Propellanes. LXVI. Exo- and Endo-Diels-A
Propellanes. LXVI. Exo- and Endo-Diels-Alder adducts of 4-substituted 1,2,4-triazoline-3, 5-diones with various 1, 6-methano [10]annulenes
✍ Pnina Ashkenazi; Menachem Kaftory; David Ginsburg 📂 Article 📅 1983 🏛 John Wiley and Sons 🌐 German ⚖ 177 KB

## Abstract Relatively few __exo__‐adducts have been obtained from the title compounds. Only one such mono‐adduct, **3**, is known. Several __exo‐endo__‐bis‐adducts have been obtained but the structure of one of these, **5**, has been proved unequivocally by X‐ray structural determination.

Propellanes. Part LXXI. Confirmation of
Propellanes. Part LXXI. Confirmation of predicted regiospecificity in Diels-Alder reactions of certain propellanes with 4-phenyl-1,2,4-triazoline-3,5-dione
✍ Pnina Ashkenazi; Menachem Kaftory; Tuǧmaç Sayraç; Günther Maier; David Ginsburg 📂 Article 📅 1983 🏛 John Wiley and Sons 🌐 German ⚖ 156 KB 👁 1 views

## Abstract Two isomeric propellane epoxides **1a** and **1b** containing a cyclohexadiene ring are attacked by the title dienophile as predicted, __syn__ to the five‐membered ether ring whose α‐hydrogens exert less repulsion than the α‐epoxy hydrogens or the epoxide oxygen, respectively, of the cy