M. Khouili et al., (3R)-4,4-dimethyl-2-oxotetrahydrofuran-3-yl (2S)-7-methoxy-2,3-dihydro-1,4-benzodioxin-2-carboxylate, ACT CRYST C, 55, 1999, pp. 387-389
The structure of the title compound, C16H18O7, a key intermediate in the sy
nthesis of antagonist adrenergic agents, is reported. The 1,4-benzodioxin r
ing shows a half-chair form with a Csp(3) atom out of the plane defined by
the remaining atoms. The lactone ring shows an envelope form.