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- W1990114182 abstract "The condensation of cis- (1) and trans-2-hydroxymethyl-4-cyclo-hexenyl-1-amine (2) and 2,3-diexo- (3) and 2,3-diendo-3-hydroxymethylbicyclo[2.2.1]heptylamine (4) with 8 different aromatic aldehydes led to ring-chain tautomeric equilibria between epimeric tetrahydro-1,3-oxazines and open-chain Schiff bases, in all cases the equilibrium mixtures consisted of two epimeric ring forms although the 2-axial epimers of the cyclohexene-fused derivatives had only a minor contribution to the ring-chain tautomeric equilibria. For the norbornane-fused derivatives the ring-chain tautomeric equilibria were taken equal to the ratio of the sum of the ring forms and the amount of the E-isomer of the open form in which case the simple equation, log KX = 0.76σ+ + log KX=H derived recently for ring-chain tautomerism in 1,3-oxazines prevailea again for each system studied." @default.
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- W1990114182 date "1991-01-01" @default.
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- W1990114182 title "Ring-chain tautomerism and three- to four-component equilibria in fused-ring tetrahydro-1,3-oxazines" @default.
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- W1990114182 doi "https://doi.org/10.1016/s0040-4020(01)86442-5" @default.
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