Cycloadditions. 48. Novel heterocycles by bis heteroannulation of oxazoles

A Hassner, B Fischer

Index: Hassner, A.; Fischer, B. Journal of Organic Chemistry, 1991 , vol. 56, # 10 p. 3419 - 3425

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Citation Number: 11

Abstract

We report the first examples of intramolecular Diels-Alder addition of heterodienophiles N= N, CN, C-0, C 4 to oxazoles. The required ðoxy-and bphenyloxazoles were synthesized bearing a side chain of variable length on C-2 to which the different heterodienophiles are attached. The products of the thermal bis heteroannulation are 3-triazolines, imidazolines, oxazolines, or thiazolines fused to a five-to six-membered ring. Relative reactivities were ...