X=Y-ZH Systems as Potential 1,3-Dipoles. Part 10. The Decarboxylative Route to Azimethine Ylides. Background and Relevance to Pyridoxal Decarboxylases
The reaction of primary and α,α-disubstituted α-amino acids with pyridoxal in the presence of N-phenylmaleimide in various solvents at temperatures up to 120 deg C gives rise to two series of cycloadducts.One series arises from azomethine ylides formed by
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