| abstract |
NEW MATERIAL:Optically active compound shown by formulas I and II (R and R - are 1W18C alkyl wherein one or both of R and R - contain branched chain; * is asymmetric carbon; R1 is 1W18C alkyl, alkoxyalkyl, etc.; R2 and R3 are alkyl wherein one of R2 and R3 contains branched chain; aWc are 0, 1 or 2 and a+b+c≥2; A is single bond, O, CO 2 , etc.; B and C are single bond, CO 2 OCO, etc.; D is single bond, CO 2 CH 2 , etc.; XWZ are 1,4-phenylene, 2,5-pyridine, 2,5-pyrimidine, etc.). n EXAMPLE: (S)-2-Methoxy-3-methylbutanol. n USE: An intermediate for synthesizing optical switch material, especially an intermediate for ferroelectric liquid crystal compound, namely as an asymmetric source for liquid crystal compound and an intermediate for synthesizing antibiotics, drugs, physiologically active substances, further agricultural chemicals, herbicides, etc. n PREPARATION: A corresponding optically active amino acid is converted into an optically active oxy acid, its ester and further an alkoxycarboxylic acid ester to give a compound shown by formula I. n COPYRIGHT: (C)1987,JPO&Japio |