A series of palladium catalysed consecutive bis(5-exo trig)-, 5-exo trig-6-exo trig-, and 5-exo trig-7-endo trig-cyclisations via an alkene relay onto benzene or a wide range of heterocycles (pyrrole, furan, thiophen, indole, pyridine, pyridones) generates 5,5-, 5,6- and 5,7-spiroindolines in good yield.
A series of palladium catalysed consecutive bis(5-exo trig)-, 5-exo trig-6-exo trig-, and 5-exo trig-7-endo trig-cyclisations via an alkene relay onto benzene or a wide range of heterocycles (pyrrole, furan, thiophen, indole, pyridine, pyridones) generates 5,5-, 5,6- and 5,7-spiroindolines in good yield.
The addition of TlOAc (3 mol) promotes a series of cylisation-carbonylation reactions under 1 atm of CO at 65-degrees-C. One example of a bis-cyclisation is reported.
A series of palladium catalysed consecutive bis(5-exo trig)-, 5-exo trig-6-exo trig-, and 5-exo trig-7-endo trig-cyclisations via an alkene relay onto benzene or a wide range of heterocycles (pyrrole, furan, thiophen, indole, pyridine, pyridones) generates 5,5-, 5,6- and 5,7-spiroindolines in good yield.