3-Hydroxymethyl-2, 3-dihydro-4H-1, 3-benzoxazin-4-one and a number of its perhydrogenated derivatives were prepared from the corresponding 2- hydroxycarboxamides by treatment with a formaldehyde/formic acid mixture. Thermal decomposition of the 3-hydroxymethyl derivatives led to the previously unknown parent compounds. With one exception (14), both in the N-unsubstituted (16–18) and in the N- ...
