Reactions of Azines. 11. Preparation of 4H-Pyrazolooxadiazines
The title compounds were prepared by allowing acyl isocyanates to react with azine phosphoranes 14.Phenylacetyl isocyanate lost HNCO on reacting with 14 and gave 2,3-dimethyl-4,6,7-triphenyl-4H-pyrazolooxazine (19).
Reactions of Azines. 7. Synthesis and Thermal Rearrangement of 1-Oxo-3,4-diaza-2,4,6-heptatrienes and 1-Oxo-3,4-diaza-2,4,6,7-octatetraenes (Allenyl Azines)
The preparation and "criss-cross" cycloaddition reactions of 1-oxo-3,4-diaza-2,4,6-heptatrienes 5 obtained form 1-substituted triphenylphosphonium 2-propylides 23a-e and formaldehyde, benzaldehyde, or p-nitrobenzal
Schweizer, Edward E.,Lee, Kee-Jung
p. 1959 - 1964
(2007/10/02)
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