Certain anti-hypertensive 2,3-dihydrobenzofuran compounds

A compound of the formula I:

• ##STR44## in which:
• each of X.sub.1 and X.sub.2, which are identical or different, represents a hydrogen or halogen atom or an alkoxy radical containing from 1 to 4 carbon atoms, or they together form a methylenedioxy radical,
• X.sub.3 represents a hydrogen atom or an alkyl radical having from 1 to 4 carbon atoms,
• Y represents a hydrogen atom or a hydroxy radical,
• each of R.sub.1 and R.sub.2, which are identical or different, represents an alkyl radical having from 1 to 4 carbon atoms, provided that when Y represented a hydrogen atom, X.sub.1 or X.sub.2 or X.sub.1 and X.sub.2 simultaneously represent an alkoxy radical containing from 1 to 4 carbon atoms,
• or R.sub.1 is methyl radical and R.sub.2 represents a phenylalkyl group containing from 7 to 9 carbon atoms, or a 2-indanyl group,
• each of which is optionally substituted on the aromatic ring by one or two alkoxy radicals containing from 1 to 4 carbon atoms, provided that R.sub.2 represents alkoxy-substituted phenylalkyl when both of X.sub.1 and X.sub.2 represent a hydrogen or halogen atom and Y represents a hydrogen, in racemic form or in the form of optical isomers, and their addition salts with pharmaceutically acceptable mineral or organic acids.