Patent ID: 6495217
Filing Date: 2002-12-17
Classification: C07C,C07D,C09K

Abstract:
A chiral compound of formula I whereinC is a chiral carbon atom; * Y1 is -Y-R3 and Y2 is -Y-R4, or alternatively Y1 and Y2 together are â€”COâ€” or â€”C(XR3)(XR4)â€”; R1, R2, R3 and R4 are independently of each other H, CN, halogen, or an aromatic, aliphatic or araliphatic group with up to 50 C atoms; X is in each case independently â€”Oâ€”, â€”Sâ€”, â€”COâ€”, â€”COOâ€”, â€”OCOâ€”O, â€”COâ€”NHâ€”, â€”NHâ€”COâ€”, â€”OCH2â€”, â€”CH2Oâ€”, â€”CH&boxH;CHâ€”, â€”Câ‰¡C, â€”SCH2â€”, â€”CH2Sâ€”, â€”CH&boxH;CHâ€”COOâ€”, â€”OOCâ€”CH&boxH;CHâ€” or a single bond; and Y is in each case independently â€”COâ€”, â€”COOâ€”, â€”COâ€”NHâ€”, â€”COâ€”CH&boxH;CHâ€” or a single bond wherein a) if Y1 and R1-X are each H and Y2 is phenyl, then R2 is not H or CH3; and b) if Y1 is Y-R3 and Y2 is Y-R4, then Yâ€”R3 and Y-R4 are not both H, or c) when Y1 and Y2 together are â€”COâ€” or â€”C(XR3)(XR4)â€”, then at least one of R1, R2, R3 and R4 is of formula I* -(Sp-X)n-MG-Râ€ƒâ€ƒI* whereinSp is in each case independently a spacer group with 1 to 20 C atoms; n is 0 or 1; MG is a bicyclic or tricyclic mesogenic group; R is in each case independently H, CN, halogen, a straight-chain or branched-chain alkyl having up to 25 C atoms which is unsubstituted, or mono- or polysubstituted by halogen or CN, or a staight-chain or branched-chain alkyl having up to 25 C atoms in which one or more nonadjacent CH2 groups is, in each case independently from one another, replaced by â€”Oâ€”, â€”Sâ€”, â€”NHâ€”, â€”N(CH3)â€”, â€”COâ€”, â€”COOâ€”, â€”OCOâ€”, â€”OCOâ€”Oâ€”, â€”Sâ€”COâ€”, â€”COâ€”Sâ€” or â€”Câ‰¡Câ€” in such a manner that oxygen atoms are not linked directly to one another and which is unsubstituted, or mono- or polysubstituted by halogen or CN, or R can also be in each case independently P-(Sp-X)nâ€¢; and P is a polymerizable group.