The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Nov. 22, 1994
Filed:
Feb. 24, 1994
Applicant:
Inventors:
Wen-Liang Tsai, Hsinchu, TW;
Shu-Hui Yang, Taipei, TW;
Assignee:
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C09K / ; C09K / ; C07C / ; C07C / ;
U.S. Cl.
CPC ...
25229901 ; 25229964 ; 25229965 ; 25229966 ; 25229967 ; 560 59 ; 560 61 ; 560 64 ; 560 65 ; 568631 ; 568642 ; 568644 ; 568645 ;
Abstract
Optically active compounds of general formulae ##STR1## wherein A is O or S, R.sub.1 is a hydrogen atom, an alkyl group having 1-22 carbon atoms, a hydroxy containing alkyl group, para-alkyl substituted phenyl, para-alkyl substituted biphenyl, hydroxyphenyl, hydroxybiphenyl or tosyl; R.sub.2 is an alkyl group having 2-8 carbon atoms; m is an integer of 0-5, n is 0 or 1, where when m=0, n is not 1; p is 0 or 1; q is 0 or 1; D and E are independently H or a halogen atom; R.sub.3 is a linear alkyl group having 1 to 22 carbon atoms; and * and ** are asymmetric centers.