名称:
Crystal and molecular structure of 12(S)-acetoxy-4(S),8(R)-dimethyl-3-oxo-1(R)-5(S)-9(S)-2-oxatricyclo[4.4.7.01,9.3.4.8.01,5]tridecane
摘要:
The structure of the title compound, a cyclic ether acetate lactone, has been established uniquely by X-ray crystallography. C16H24O4 is orthorhombic, space group P2(1)2(1)2(1), with the cell dimensions a = 7.524(2), b = 10.686(2), c = 19.472(2) angstrom, V = 1565.6(4) angstrom 3, Z = 4, M(r) = 280.4, D(x) = 1.19 g cm-3, D0 = 1.20 g cm-3, F(000) = 608, T = 293 K, final R = 0.050. The two cyclohexane ring junction is cis while the lactone ring junction is trans. Both the cyclohexane rings have the chair conformation and the gamma-lactone ring has an envelope conformation with C(7) being at the tip of the flap. The acetoxy side chain is alpha-equatorial. There is an intramolecular C-H---O interaction C(4) . . . O(4) = 2.666(4) angstrom.