E. Comanita et al., Synthesis and reactivity of some Mannich bases. VII. Synthesis of 3-(2-dialkylaminoethyl)-1,2-benzisoxazoles, HETEROCYCLE, 51(9), 1999, pp. 2139-2146
3-(2-Dialkylaminoethyl)-1,2-benzisoxazoles (2) are accessible by direct cyc
lization of the corresponding Mannich bases oxime acetates (11) in refluxin
g benzene in the presence of anhydrous potassium carbonate. The previously
known methods for ring closure to 1,2-benzisoxazole were ineffective for th
is class of pharmacologically relevant compounds.