Heterocycles p. 219 - 242 (1994)
Update date:2022-08-03
Topics:
Padwa, Albert
Coats, Steven J.
Hadjiarapoglou, Lazaros
The previously unknown 8H-anhydro-4-hydroxy-2-oxo-1,3-thiazinium hydroxides (1) were prepared and their 1,4-dipolar cycloaddition behavior was examined.In most cases, elimination of the proton in the 8-position of the mesoionic ring was observed to occur unless extremely reactive dipolarophiles were used.The S,N-ketene acetals were converted to the corresponding α-diazo ketones for further study.
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