Journal of Heterocyclic Chemistry p. 501 - 503 (1997)
Update date:2022-08-16
Topics:
Ito, Kunio
Miyajima, Shingo
Methyl (E)-4,4-dimethyl-5-oxo-2-pentenoate (1, X = O) reacted with 1,2- or 1,3-aminoalcohols 3 to yield oxazolidines 4a-c or tetrahydro-1,3-oxazines 4d,e. The corresponding imino ester 1 (X = NBu-t) also gave 4 on reaction with 3. Compounds 4 on heating at 230° yielded 4,5-dihydrooxazoles 5a-c or 5,6-dihydro-4H-1,3-oxazines 5d,e along with methyl 4-methyl-3-pentenoale (6).
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