Liquid crystalline compounds and process for production thereof
AssigneeDaiso Co., Ltd.
InventorsKazuhiko Sakaguchi, Naoya Kasai, Yoshikazu Takehira, Tohru Kitamura, Yutaka Shiomi
Life of this patent
Estimating the term…
Abstract
Liquid crystalline compounds having an optionally active .gamma.-lactone ring of the formula: ##STR1## wherein R.sup.1 is a group selected from the group consisting of ##STR2## n and e are each independently 0 or 1; R.sup.3 is an alkyl group having 1 to 15 carbon atoms; R.sup.2 is a group of the formula: --(CO).sub.m --R.sup.4 ; m is 0 or 1; R.sup.4 is hydrogen atom or an alkyl having 1 to 15 carbon atoms; and the symbol * is an asymmetric carbon atom, and an intermediate thereof, and process for the production of the same.
Claims2
A process for preparing a liquid crystalline compound having an optically active .tau.-lactone ring of the formula:
- ##STR107## wherein R' is a group selected from the group consisting of ##STR108## n and e are each independently 0 or 1;
- R.sup.3 is an alkyl group having 1 to 15 carbon atoms;
- R.sup.4 is an alkyl group having 1 to 15 carbon atoms;
- and the symbol * is an asymmetric carbon atom, which comprises reacting an optically active glycidyl ether of the formula:
- ##STR109## wherein R.sup.1 and the symbol * are as defined above, with a malonate (C) of the formula:
- ##STR110## wherein R.sup.4 is as defined above, and R.sup.5 is a lower alkyl group, in the presence of a base in an organic solvent, the ether (B) and the malonate (C) reacting to form the compound (A-2).
Dependencies are inferred from the claim text.