Synthesis and Characterization of Cellulose Carbamates Having α-Amino Acid Moieties

Autor:	Yoshikazu Kitajyo, Xiande Shen, Toshifumi Satoh, Norihiko Sugie, Toyoji Kakuchi, Qian Duan
Rok vydání:	2005
Předmět:	chemistry.chemical_classification Carbamate Polymers and Plastics medicine.medical_treatment Substituent Chemical modification Ether Alcohol General Chemistry Condensed Matter Physics Amino acid chemistry.chemical_compound chemistry Materials Chemistry medicine Organic chemistry Molecule Cellulose
Zdroj:	Polymer Bulletin. 55:317-322
ISSN:	1436-2449 0170-0839
DOI:	10.1007/s00289-005-0442-x
Popis:	The reaction of cellulose with N-carbonyl α-amino acid ester 1 leading to cellulose carbamate 2 was carried out in N,N-dimethylacetamide at 100 °C. For N-carbonyl L-leucine ethyl ester (1a), the degree of the carbamate substituent (DS) in 2a was 2.5 for [1a]/[glucose units in cellulose] = 3.0 and reached ca. 3.0 for [1a]/[glucose units in cellulose] = 4.0. Cellulose carbamate 2a was highly soluble in not only aprotic polar solvents but also other organic solvents such as ethyl ether and methyl alcohol. The chiral discrimination ability of 2a was higher than those of the cellulose carbamates having L-phenylalanine and L-aspartic acid moieties.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::e2b9fc10edcf200471f20d3c115b4433 https://doi.org/10.1007/s00289-005-0442-x Zobrazit plný text záznamu Full text from SpringerLink