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2005
Furan derivatives
R 0060
I--Catalyzed Methyl—Oxygen Bond Cleavage in 2-Methoxyfurans. An Efficient
of Butenolides. — In the presence of NaI, 2-methoxyfurans undergo cleav25- 104 Synthesis
age of the Me-O bond. Subsequent reaction with organic iodides leads to efficient formation of butenolides of type (III) and (IX). Interestingly, reaction of the methoxyfuran
(Ia) with EtI gives the ethyl- and methyl-substituted butenolides (V) and (VII). This
indicates that MeI is formed in situ under these conditions. — (MA*, S.; LU, L.; LU,
P.; J. Org. Chem. 70 (2005) 3, 1063-1065; State Key Lab. Organomet. Chem.,
Shanghai Inst. Org. Chem., Chin. Acad. Sci., Shanghai 200032, Peop. Rep. China;
Eng.) — Jannicke
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