Tetrahedron p. 23 - 27 (1983)
Update date:2022-08-02
Topics:
Rodriguez, H.
Pavez, H.
Marquez, A.
Navarrete, P.
2,4-diphenyl- and 2-p-methylphenyl-4-phenyl-Δ2-oxazolin-5-ones react at 80-110 deg C with nitrosobenzene to give benzamidines.However, reactions conducted at room temperature afford in high yield, the heretofore undescribed Δ4-oxadiazolin-3-carboxylic acids by regiospecific 1,3-dipolar cycloaddition.Thermal decomposition of the oxadiazolinecarboxylic acids gives the corresponding benzamidines.
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