Table 1.

(4+3) Cycloadditions of Oxyallyls with Disubstituted Furans.^a

furan	syn-I	anti-I	syn-II	anti-II	yield (%)
	–	–		–	67b
	–	–		–	60b
				–	61c
	–	–		–	40b

^aIsolated yields are quoted. Isomer ratios are given in parentheses and were determined by ¹H and/or ¹³C NMR.

^bFrom reaction with allenamide 1b.

^cFrom reaction with allenamide 1c.