The Preparation and Reactions of Anions of Certain Schiff Bases

References

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• The C(α)-H resonance for the starting material for IIa was noted at δ 2.00 ppm. The imine for preparation of II b-e, had a C(α)-H resonance at α 2.23 ppm.
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• We have successfully found the appropriate conditions for the di-Aldol condensation of 1,6-azine dicarbanions. The completed project will be reported in another journal. See also: reference 13.
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• The same product was ottained when one, two or three molar equivalents of base were used per molar equivalent of imine. The best yields were obtained by the procedure described.
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• An nmr spectrum of the same material was taken on a Varian Associates A-60 NMR Spectrometer (Univ. of S. C. at Columbia). The sharp singlet of δ 1.83 ppm (CDC13) supported the assignment of this absorption to C(α)-hydrogens.
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