The [1 + 4] cycloaddition of isocyanides with 1-aryl-2-nitro-1-propenes. Methyl 2-nitro-3-arylpropenoates and methyl 2-nitro-2,4-pentadienoates. Synthesis of 1-hydroxyindoles and 1-hydroxypyrroles
A selective C3 carboxamidation of indoles including free (NâH) ones by palladium-catalyzed sequential CâH activationâisocyanide insertion has been developed.