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:
Jan. 31, 2006
Filed:
Dec. 30, 2003
Applicants:
Shean-jeng Jong, Tao-Yuan, TW;
Chun-hsu Lin, Tao-Yuan, TW;
Ming-te Shih, Tao-Yuan, TW;
Chung-chien Chang, Taipei, TW;
Inventors:
Shean-Jeng Jong, Tao-Yuan, TW;
Chun-Hsu Lin, Tao-Yuan, TW;
Ming-Te Shih, Tao-Yuan, TW;
Chung-Chien Chang, Taipei, TW;
Assignee:
Chung-Shan Institute of Science & Technology, Tao-Yuan, TW;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C07C 17/02 (2006.01); C07C 17/04 (2006.01); C07C 17/06 (2006.01); C07C 17/00 (2006.01);
U.S. Cl.
CPC ...
Abstract
A synthesis method of α,α,α',α′-tetrachloro-p-xylene is disclosed. The method includes reacting terephthaldicarboxaldehyde with a mixture of SOCland dimethylformamide (DMF) to obtain a product mixture containing α,α,α′,α′-tetrachloro-p-xylene as a major product and 4-dichloromethyl benzaldehyde as a side product, which can be separated by silica column chromatography.