Hj. Wu et al., INTRAMOLECULAR DIELS-ALDER REACTION OF FURANS WITH ALLENYL ETHERS FOLLOWED BY METHYLTHIO GROUP 1,4-REARRANGEMENT, Tetrahedron letters, 35(5), 1994, pp. 729-732
The base-catalyzed intramolecular Diels-Alder reactions of the furfury
l propargyl ethers la-le gave compounds 6a-6e as the major product res
pectively, a novel reaction involving an intramolecular Diels-Alder re
action followed by a methylthio group 1,4-rearrangement.