2,3-Dihydrobenzofuran of formula: ##STR1## wherein R.sup.1 and R.sup.2 are each, independently, a lower alkyl or lower phenylalkyl or form, together with the nitrogen atom to which they are attached, a 4 to 8-membered saturated heterocyclic ring having 3 to 7 cyclic carbon atoms, a 4 to 8-membered saturated heterocyclic ring having 2 to 6 cyclic carbon atoms and two heteroatoms one of which is said nitrogen atom and the other is an oxygen atom, a sulphur atom or another nitrogen atom, said other nitrogen atom being optionally substituted by a phenyl, halophenyl, trifluromethylphenyl, lower alkylphenyl or lower alkoxyphenyl; n is 2 or 3, and the salts thereof.
化学式为##STR1##的
2,3-二氢苯并呋喃,其中R.sup.1和R.sup.2各自独立地是较低的烷基或较低的苯基烷基,或者与它们连接的氮原子一起形成一个4至8环的饱和杂环,其具有3至7个环状碳原子,或者是一个4至8环的饱和杂环,其具有2至6个环状碳原子和两个杂原子,其中一个是所述的氮原子,另一个是氧原子、
硫原子或另一个氮原子,所述的另一个氮原子可以由苯基、卤代苯基、三
氟甲基苯基、较低的烷基苯基或较低的烷氧基苯基取代;n为2或3,以及其盐。