Dl. Jiang et Jw. Herndon, Generation and trapping of isobenzofuran intermediates formed in the coupling of Fischer carbene complexes and o-alkynylbenzoyl derivatives, ORG LETT, 2(9), 2000, pp. 1267-1269
The coupling of o-alkynylbenzoyl derivatives with carbene complexes has bee
n investigated. The reaction initially affords isobenzofuran derivatives, w
hich convert to alkylidenephthalan derivatives or can be trapped by various
dienophiles to afford benzo-oxanorbornene derivatives.