4-substituted-1,2,3,4-tetrahydro-3,3-dimethylisoquinolines. II.
作者:George Bobowski、Jeffrey M. Gottlieb
DOI:10.1002/jhet.5570190102
日期:1982.1
A practical synthesis (Scheme I) is described for the preparation of a series of 4-substituted-3,3-dimethyl-1,2,3,4-tetrahydroisoquinolines (3). Treatment of α-(1-amino-1-methylethyl)arylmethanols or α-(1-amino-1-methylethyl)heteroarylmethanols (5) with aromatic aldehydes gave imines 7 from which amino alcohols 8 were derived by reduction with potassium borohydride. Acid catalyzed cyclization of 8