The First Example of 4,7,8,9-Tetrahydrothieno-[2,3-d]Azocine Synthesis by Domino Reaction of 4-ARYL-4,5,6,7-Tetrahydrothieno[3,2-c]Pyridines with Activated Alkynes

1-Aryl-substituted tetrahydrothieno[3,2-с]pyridines easily undergo domino reactions with activated alkynes, giving good yields of the corresponding tetrahydrothieno[2,3-d]azocines. The reactions of 1-methyl-substituted tetrahydrothieno[3,2-с]pyridine were more complicated.