Tetrahedron letters

Conversion of triazolides into oxazoles by flash-vacuum pyrolysis.

A Maquestiau, E Puk, R Flammang

文献索引：Maquestiau, A.; Puk, E.; Flammang, R. Tetrahedron Letters, 1986 , vol. 27, # 34 p. 4023 - 4024

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被引用次数: 6

摘要

One of the most general methods for the preparation of various oxazole derivatives is the dehydration reaction of a-acylamino carbonyl compoundsl. Surprisingly, the introduction of a single alkyl or aryl substituent on the carbon 5 of the oxazole ring appears to be quite time consuming. For instance, the synthesis of 5-phenyloxazole (2) requires four steps from a- aminoacetophenone and ethyloxalylchloride2. Also, the simple 5-methyloxazole (6) has ...