- Synthesis method of 2,3,4,5-tetramethyl cyclic di-p-xylyene
-
The invention discloses a synthesis method of a 2,3,4,5-tetramethyl cyclic di-p-xylyene, and relates to the field of parylene dimer preparation. 2,3,4,5,6-pentamethylbenzyl chloride and trimethylaminewhich are used as raw materials react to generate 2,3,4,5,6-pentamethylbenzyltrimethylammonium chloride, and the 2,3,4,5,6-pentamethylbenzyltrimethylammonium chloride reacts with sodium hydroxide, acatalyst, a solvent and the like to generate the 2,3,4,5-tetramethyl cyclic di-p-xylyene. The method is a high-yield and low-cost synthesis method; and in addition, reaction materials are recycled, sothe cost is further reduced, environmental pollution is reduced, and large-scale production is facilitated.
- -
-
Paragraph 0018; 0028-0035
(2020/07/03)
-
- CYCLOPHANE, XIV: DARSTELLUNG POLYMETHYLIERTER PARACYCLOPHANE
-
Starting from 4, 5, 12, 13-tetrakis(methoxycarbonil)paracyclophane (1), the penta-(4), hexa-(6a-c), hepta-(7), and octamethyl-(8) derivatives have been prepared by a repetative formylation-reduction sequence.
- Eltamany, Sayed H.,Hopf, Henning
-
p. 4901 - 4904
(2007/10/02)
-