Chiral compounds and compositions containing the same

Details Chiral compounds and compositions containing the same Chiral compounds and compositions containing the same

2006-05-30

2006-05-30

Wu, Shean C. (Department: 1756)

Stock material or miscellaneous articles

Liquid crystal optical display having layer of specified...

C252S299010, C252S299200, C560S080000, C560S256000

Reexamination Certificate

active

07052743

ABSTRACT:
The invention relates to a novel class of compounds useful as chiral dopants, which compounds are available in both enantiomeric forms. Another aspect of the invention relates to such compounds having a enantiomeric excess of one enantiomeric form, which are useful in liquid crystal formulations. Such formulations are advantageous in displays and various other products.

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Birman, Vladimir B. et al: “1,1′-Spirobiindan-7,7′-diol: a novel, C2-symmetric chiral ligand” Tetrahedron: Asymmetry, 10(1), 125-131 CODEN: TASYE3; ISSN: 0957-4166, 1999, XP002315481 P. 126, Scheme 1, e.g. compounds 14 to 16; p. 127, compounds 16 to 19; Scheme 2; p. 130, item 3.9.
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Zhou, Hai et al: “Highly Enantioselective Copper-Catalyzed Conjugate Addition of Diethylzinc to Enones using Chiral Spiro Phosphoramidites as Ligands,” Journal of Organic Chemistry, 68(4), 1582-1584 CODEN: JOCEAH; ISSN: 0022-3263, vol. 68, No. 4, 2003, pp. 1582-1584, XP002315482, p. 1582, Figure 1; sCHEME 1; Abstract.

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