Spiro Derivatives of Tetrahydrothiophene. Synthesis of the Quinolizidine <3-spiro-2′> tetrahydrothiophene System Using Solid/Liquid or Liquid/Liquid Phase-Transfer Catalysis
Spiro Derivatives of Tetrahydrothiophene. Synthesis of the Quinolizidine <3-spiro-2′> tetrahydrothiophene System Using Solid/Liquid or Liquid/Liquid Phase-Transfer Catalysis