1972 Volume 45 Issue 7 Pages 2050-2052
The 1,3-dipolar cycloaddition of substituted 1-benzoyliminopyridinium ylides (1, 6, and 9) with dimethyl acetylenedicarboxylate (DAG) produced the corresponding rearrangement compounds (3, 4, 7, 8, and 10). On the other hand, the similar reaction of 11 with DAC in acetonitrile gave 12, accompanied with a Sommelet-type rearrangement compound, 13. The structural elucidation of these products was accomplished by spectral inspections.
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