Table 1.

Structures, reaction times, yields, and melting points for the synthesis of carbamate and carbonate dimers of melampomagnolide B from intermediate 6

Product	Yield (%)a	Time (hr)	Mp (°C)
	60	8	113-115
	65	6	80-81
	87	6	84-86
	75	3	96-97
	70	3	99-101
	77	3	90-91
	80	3	111-113
	75	3	94-96
	65	16	91-92
	70	12	170-171
	75	24	114-115

^aIsolated yields