Polycyclic N-Heterocyclic Compounds. Part 63 Improved Synthesis of 5-Amino-1,2-dihydrofuro[2,3-c]isoquinolines via Truce-Smiles Rearrangement and Subsequent Formation to Furo[2,3-c]isoquinoline

An improved synthesis of 5-amino-1,2-dihydrofuro[2,3-c]isoquinoline has been achieved using a slight niodification of reaction Conditions for the Truce-Smiles rearrangement. Acid treatment of the obtained 5-amino-1,2-dihydrofuro [2,3-c]isoquinolines gave unexpected ring-opened spiro ring compounds. The previously unreported Parent compound, furo[2,3-c]isoquinoline, was also synthesized.