Synthesis and properties of carbamate- and amine-containing poly(phenylacetylenes) was written by Saeed, Irfan;Khan, Fareha Zafar;Shiotsuki, Masashi;Masuda, Toshio. And the article was included in Journal of Polymer Science, Part A: Polymer Chemistry in 2009.Recommanded Product: tert-Butyl (3-ethynylphenyl)carbamate This article mentions the following:
The 3- and 4-aminophenylacetylenes protected by t-butoxycarbonyl (t-Boc) and 9-fluorenylmethoxycarbonyl (Fmoc) groups were synthesized and polymerized using [(nbd)RhCl]2 (I) and [(nbd)Rh+-鐣?sup>6-PhB–Ph3] catalysts. The t-Boc-containing polymers were obtained in high yield (82-91%). Among the Fmoc-protected monomers, the para-derivative polymerized well [yield = 85-94%], whereas its meta-substituted analog did not afford high mol. weight polymer in good yield [yield = 10-15%]. The use of KN(SiMe3)2 as a cocatalyst in conjunction with I led to a dramatic increase in the mol. weight of the polymers. The acid- and base-catalyzed removal of the t-Boc and the Fmoc groups, resp., generated primary amine-containing polymers which cannot be obtained directly by the polymerization of the corresponding monomers. The solubility characteristics of the polymers bearing protected amino groups were quite different from those of the unprotected ones, the former being soluble in polar solvents, whereas the latter displayed poor solubility even in polar protic or highly polar aprotic solvents. The attempts to accomplish the free-standing membrane fabrication by solution casting were successful only for 3-(tert-butoxycarbonylamino)phenylacetylene homopolymer, and an augmentation in the gas permeability and CO2/N2 permselectivity was discerned in comparison with the unsubstituted poly(phenylacetylene) and poly(m-t-butyldimethylsiloxyphenylacetylene). In the experiment, the researchers used many compounds, for example, tert-Butyl (3-ethynylphenyl)carbamate (cas: 185619-66-3Recommanded Product: tert-Butyl (3-ethynylphenyl)carbamate).
tert-Butyl (3-ethynylphenyl)carbamate (cas: 185619-66-3) belongs to esters. Esters are widespread in nature and are widely used in industry. In nature, fats are in general triesters derived from glycerol and fatty acids. Esters are responsible for the aroma of many fruits, including apples, durians, pears, bananas, pineapples, and strawberries. Acyl chlorides and acid anhydrides alcoholysis is another way to produce esters. Acyl chlorides and acid anhydrides react with alcohols to produce esters. Anydrous conditions are recommended since both acyl chlorides and acid anhydrides react with water.Recommanded Product: tert-Butyl (3-ethynylphenyl)carbamate
Referemce:
Ester – Wikipedia,
Ester – an overview | ScienceDirect Topics