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Carbodiimides. I. Conversion of Isocyanates to Carbodiimides with Phospholine Oxide Catalyst

โœ Scribed by Campbell, Tod W.; Monagle, John J.; Foldi, Veronika S.


Book ID
111986570
Publisher
American Chemical Society
Year
1962
Tongue
English
Weight
681 KB
Volume
84
Category
Article
ISSN
0002-7863

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Cycloaddition of Carbodiimides with a He
โœ Latchezar S. Trifonov; Nadja I. Christova; Valentin S. Dimitrov; Alexander S. Or ๐Ÿ“‚ Article ๐Ÿ“… 1992 ๐Ÿ› John Wiley and Sons ๐ŸŒ German โš– 227 KB ๐Ÿ‘ 1 views

Cycloaddition of the allenic acid 3 with the N-cyclohexyl-N'-heteroaromatic carbodiimides 2a and 2b gave the isomeric pyrido[l,2-~]pyrimidinones 4 and 5 and thiazolo[3,2-~]pyrimidinones 6 and 7, respectively, instead of the expected Diels-Alder adducts analogous to 1. The compounds of the latter typ