A Simple and Efficient One Pot Synthesis of 4-Oxo-spiro[thiazolidine-2,2'(1'H)quinolines] and Their Reactions with DDQ
摘要:
The treatment of two equivalents of the anion of 3,4-dihydro-1H-quinoline-2-thione (3) with one equivalent of one of the N-substituted 2-bromoacetamides (4a-d) at room temperature afforded the title compounds in good yields (Scheme 1, Table 1). The reaction of the compounds (6a-d) with DDQ at room temperature and 90 degrees C was studied. Mechanistic aspects of the processes are briefly discussed.