## Abstract The title compounds have been isolated and their structures determined by Xβray crystallography. Their relative stability is discussed in terms of theory and experiment. The __endo__βadduct is the thermodynamically more stable one.
Propellanes. Part LXXII. The structure of the 4-methyl-1,2,4-triazoline-3,5-dione adduct of the propellane lactone obtained by oxidation of biphenylene
β Scribed by Pnina Ashkenazi; Menachem Kaftory; David Ginsburg
- Publisher
- John Wiley and Sons
- Year
- 1983
- Tongue
- German
- Weight
- 87 KB
- Volume
- 66
- Category
- Article
- ISSN
- 0018-019X
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β¦ Synopsis
Abstract
The title compound reacts with the dienophile by attacking the face of a cycloβhexadiene ring which is synβ to the lactone ring.
π SIMILAR VOLUMES
C35H49!303, orthorhombic, P212121, a = 7.142(1), b = 11.873(4), c = 37.852(9)A; V = 3209.7(15)i3, D5 = 1.16 Mg m-3 for Z = 4 . been solved by direct methods (MULTAN 8 0 ) and refined to a final R value of 0.068 for 1920 observed reflections. The absolute stereochemistry of the title compound is show
## Abstract For Abstract see ChemInform Abstract in Full Text.
## Abstract The piperidine ring in the title compound is in the chair conformation, whereas the diketopiperazine ring has a boat form. The benzyl group is axially positioned and folded above the diketopiperazine ring. No dimerisation is observed.
## 3,5-diones The photoaddition of 4-methyl-1,2,4-triazoline-3,5-dione (4-MTAD) with a wide variety of acyclic, cyclic and crown aliphatic ethers has been investigated. Monochromatic (Ξ» = 514.5 nm) or polychromatic (Ξ» Υ 310 nm) irradiations give identical mono-urazolyl ethers as reaction products.
## Abstract ChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 100 leading journals. To access a ChemInform Abstract of an article which was published elsewhere, please select a βFull Textβ option. The original article is trackable v