(1R,1'R,3S,3'S)-5,5',10,10'-Tetra-meth-oxy-1,1',3,3'-tetra-methyl-3,3',4,4'-tetra-hydro-1H,1'H-8,8'-bi[benzo[g]isochromene]

Jimmy J P Sejberg; Jonathan Sperry; Ka Wai Choi; Peter D W Boyd; Margaret A Brimble

doi:10.1107/S1600536808007599

(1R,1'R,3S,3'S)-5,5',10,10'-Tetra-meth-oxy-1,1',3,3'-tetra-methyl-3,3',4,4'-tetra-hydro-1H,1'H-8,8'-bi[benzo[g]isochromene]

Acta Crystallogr Sect E Struct Rep Online. 2008 Mar 29;64(Pt 4):o758. doi: 10.1107/S1600536808007599.

Authors

Jimmy J P Sejberg¹, Jonathan Sperry, Ka Wai Choi, Peter D W Boyd, Margaret A Brimble

Affiliation

¹ Department of Chemistry, University of Auckland, Private Bag 92019, Auckland, New Zealand.

Abstract

In the title compound, C(34)H(38)O(6), the methyl groups on each pyran ring exhibit 1,3-cis stereochemistry, established during synthesis by pseudo-axial delivery of hydride during a lactol reduction step. In the crystal structure, the mol-ecule lies on a twofold rotation axis and the torsion angle about the central diaryl bond is 41.3 (1)°. The mol-ecules pack in a herringbone arrangement.