CAS No.6338-41-6,2-Furancarboxylic acid,5-(hydroxymethyl)- Suppliers

Oligomers from hydroxymethylfurancarboxylic acid: Oligomers from hydroxymethylfurancarboxylic acid. Hirai, Hidefumi (Fac. Eng., Univ. Tokyo, Tokyo 113, Japan). J. Macromol. 6338-41-6 is the cas registry number. This chemical is also mentioned in this article. Sci., Chem., A21(8-9), 1165-79 (English) 1984. CODEN: JMCHBD. ISSN: 0022-233X. DOCUMENT TYPE: Journal CA Section: 35 (Chemistry of Synthetic High Polymers) Polycondensation of 5-(hydroxymethyl)-2-furancarboxylic acid (I) [6338-41-6] was studied. Oligoesters of I were prepd. by using 2-chloro-1-methylpyridinium iodide (II) [14338-32-0] as a polycondensation agent. Soln. polycondensation in pyridine at II-I molar ratio >1.2 at 60° gave selectively the macrocyclic (crown) oligoesters at total yield >91%: cyclic trimer (>33%), tetramer (>35%), pentamer (>13%) and higher oligomers (>9%). Polycondensation in n-hexane in place of pyridine with Bu3N [102-82-9] as a scavenger of hydrogen halide produced selectively the linear oligoesters from trimer to hexamer. Use of PhMe instead of n-hexane gave the polyester and the cyclic and linear oligoesters. A mechanism is proposed for the formation of the cyclic oligoesters. .

Oligomers from hydroxymethylfurancarboxylic acid: Oligomers from hydroxymethylfurancarboxylic acid. Hirai, Hidefumi (Fac. Eng., Univ. Tokyo, Tokyo 113, Japan). J. Macromol. 6338-41-6 is the cas registry number. This chemical is also mentioned in this article. Sci., Chem., A21(8-9), 1165-79 (English) 1984. CODEN: JMCHBD. ISSN: 0022-233X. DOCUMENT TYPE: Journal CA Section: 35 (Chemistry of Synthetic High Polymers) Polycondensation of 5-(hydroxymethyl)-2-furancarboxylic acid (I) [6338-41-6] was studied. Oligoesters of I were prepd. by using 2-chloro-1-methylpyridinium iodide (II) [14338-32-0] as a polycondensation agent. Soln. polycondensation in pyridine at II-I molar ratio >1.2 at 60° gave selectively the macrocyclic (crown) oligoesters at total yield >91%: cyclic trimer (>33%), tetramer (>35%), pentamer (>13%) and higher oligomers (>9%). Polycondensation in n-hexane in place of pyridine with Bu3N [102-82-9] as a scavenger of hydrogen halide produced selectively the linear oligoesters from trimer to hexamer. Use of PhMe instead of n-hexane gave the polyester and the cyclic and linear oligoesters. A mechanism is proposed for the formation of the cyclic oligoesters. .