1997 furan derivatives furan derivatives R 0060 α-Alkoxystannyl Ethers in Organic Synthesis: Synthesis of Func— Ozonolysis of (tetrahydrofuran-216 - 136 tionalized γ-Butyrolactones. yl)tributylstannanes gives the corresponding γ-butyrolactones in good yield. The method tolerates a variety of functional groups and provides substitution patterns not available by aldol reactions from the parent lactone. — (GILBERT, P.; LEWIS, M. L.; QUAYLE, P.; ZHAO, Y.; MILLS, K.; Tetrahedron Lett. 37 (1996) 50, 9115-9118; Dep. Chem., Victoria Univ., Manchester M13 9PL, UK; EN) 1