Synthesis of 1-functionalized di- and tetramethyl-3,4-dihydrobenzofuro[3,2- g]-and [2,3- h]isoquinoline derivatives.

[Figure not available: see fulltext.] Linear and angular 1-substituted derivatives of 3,3-di- and 3,3,4,4-tetramethyl-3,4-dihydrobenzofuroisoquinoline were obtained under Ritter reaction conditions, and the stereochemical features of these compounds were analyzed. [ABSTRACT FROM AUTHOR]