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Ring transformations of heterocycles. Part 1. Transformation of 4??amino?螃?2??1, 2, 4??oxadiazolines into 1, 3, 4??oxadiazoles

MM El??Abadelah, MZ Nazer…

文献索引：El-Abadelah, M. M.; Nazer, M. Z.; Hussein, A. Q.; Awadallah, A. M.; Rademacher, P.; Woydt, M. Journal of Heterocyclic Chemistry, 1991 , vol. 28, # 5 p. 1229 - 1234

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被引用次数: 8

摘要

Abstract 3-Aryl-4-amino-δ 2-1, 2, 4-oxadiazolines 3 and their N-chloroacetyl derivatives 4, upon treatment with chloroacetic anhydride in refluxing toluene, afford 2-chloromethyl-5-aryl- 1, 3, 4-oxadiazoles 5, suggesting the conversion sequence 3→ 4→ 5. The generality of the new ring transformation 4→ 5 is supported similar conversion of other 4-(acylamino)-1, 2, 4- oxadiazolines 8 to 1, 3, 4-oxadiazoles 9.

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