Journal of Organic Chemistry p. 1338 - 1341 (1984)
Update date:2022-08-11
Topics:
Wedinger, R.
Hogeveen, H.
Noble, W. J. le
It is shown that the product of the title reaction with tert-butylacetylene and ethyl cyanoformate is not ethyl 3,5-di-tert-butyl-2-picolinate as reported in the recent literature but rather the 4,5-isomer.Varying yields of the 4,6-isomer are also obtained.The NMR spectra described for the 3,5-dimethyl analogue likewise suggest a misassignment of structure in that case.A revised mechanism is tentatively given for these reactions.
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