Z. T. Li, Y. X. Gao, Z. D. Jiao, N. Wu, D. Z. G. Wang* and Z. Yang*

Org. Lett. 2008, 10, 5163.

We reported herein a diversity-oriented synthesis of a range of fused pyran-γ-lactones that was effected through a versatile Pd−thiourea complex-catalyzed intramolecular alkoxycarbonylative annulation.