N. Harada et al., ENANTIORESOLUTION AND ABSOLUTE STEREOCHEMISTRY OF -DIACETYL-4,4',6,6'-TETRAMETHOXY-2,2'-BIPHENYLDIOL, Enantiomer, 2(5), 1997, pp. 353-358
Chiral -diacetyl-4,4',6,6'-tetramethoxy-2,2'-biphenyldiol (2) was obta
ined by high pressure liquid chromatographic (HPLC) separation of bis(
camphanate) ester 4a and successive hydrolysis with hydrochloric acid.
The absolute stereochemistry of chiral biphenyldiol [CD(+)301.2]-2 wa
s determined to be (aS) by the X-ray crystallographic analysis of bis(
camphanate) ester 4b.