Schmitz, E., Three-Membered Rings with

Schmitz, E., Three-Membered Rings with Two Hetero Atoms, 2, 83 24, 63. 

CHEC(7)195 E. Schmitz Three-membered Rings with Two Heteroatoms and Fused-ring Derivatives, in Comprehensive Heterocyclic Chemistry F, A. R. Katritzky and C. W. Rees, Eds. Pergamon, Oxford, 1984, vol. 7, p. 195. 

Five chapters have been up-dated by the authors of the original chapters that appeared in earlier volumes, as follows Quinazolines, by W. L. F. Armarego (the original chapter appeared in Volume 1), Three-membered Rings with Two Heteroatoms, by E. Schmitz (Volume 2), Physicochemical Aspects of Purines, by J. H. Lister (Volume 6), Reis-sert Compounds, by F. D. Popp (Volume 9), and Pyridazines, by M. TiSler and B. Stanovnik (Volume 9). 

The reverse reaction is possible not only photochemically, but also thermally. This is due to the lower thermal stability of this diazirine relative to the compound without a carbonylamino group, i.e., pentamethylenediazirine (5.63, Schmitz and Ohme, 1973). This decrease in stability of 5.72 is likely to be due to the pseudoconjugation of the three-membered ring with the carbonyl group, decreasing the... 

In the discussion on the structure of the aliphatic diazo compounds, the question of the existence of isomeric diazo compounds with three-membered rings was never considered. It wms therefore a surprise when the cyclic diazo compounds, i.e. the diazirines, became known their preparation wms published independently by Paulsen and by Schmitz and Ohme. ... 

---