摘要:
The synthesis of a series of guaiazulene-heterocycle hybrids via zwitterionic intermediates was performed. The multicomponent reactions of 3-isocyano-7-isopropyl-1,4-dimethylazulene 1, dimethyl acetylenedicarboxylate 2, and a third reactant 3 (cyclic CH-acids, phenols, aldehydes or amines) proceeded to afford heterocyclic guaiazulene derivatives 4.