77897-20-2

Upstream product

• 102419-26-1 4,5,12,13-tetrakis(bromomethyl)<2.2>paracyclophane 
• 37437-90-4 tricyclo[8.2.2.24,7]hexadeca-4,6,10,12,13,15-hexaene-5,6,11,12-tetracarboxylic acid tetramethyl ester 
• 77897-14-4 4,5,7,12,13-pentamethyl<2.2>paracyclophane 
• 77897-15-5 Acetic acid 13,14,15,16-tetramethyl-tricyclo[8.2.2.2^4,7]hexadeca-1⁽¹³⁾,4,6,10⁽¹⁴⁾,11,15-hexaen-5-ylmethyl ester 

Relevant academic research and scientific papers

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.

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.