8H-Anhydro-4-hydroxy-2-oxo-1,3-thiazinium Hydroxides as Mesionic 1,4-Dipoles
(EN)
Padwa, A.;
(EN)
Πανεπιστήμιο Ιωαννίνων. Σχολή Θετικών Επιστημών. Τμήμα Χημείας
(EL)
Padwa, A.;
(EN)
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. ln 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,Nketene acetals were converted to the corresponding Ξ±-diazo ketones for further study.
(EN)