Journal of Organic Chemistry p. 3821 - 3825 (1987)
Update date:2022-08-04
Topics:
Fueloep, Ferenc
Pihlaja, Kalevi
Mattinen, Jorma
Bernath, Gabor
A comparative study on the ring-chain tautomerism of 49 2-(substituted-phenyl) tetrahydro-1,3-oxazines of seven different types, namely, tetrahydro-1,3-oxazines 3,r-8a,c-2,c-4a- and r-8a,c-2,t-4a-1,3-perhydrobenzoxazines 5 and 7,r-8a,c-2,c-4- and r-8a,c-2,t-4a-1,3-perhydrobenzoxazines 9 and 11, 3,4-dihydro-2H-1,3-benzoxazines 12, and 1,2-dihydro-4H-3,1-benzoxazines 13, pointed out that in all cases the equilibria can be described with a simple equation, log Kx = (0.76 +/- 0.04)?+ + logKX=H where Kx =
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