Synthesis of an enantiomer of cellulose via cationic ring-opening polymerization
Synthesis of an enantiomer of cellulose via cationic ring-opening polymerization
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通过阳离子开环聚合合成纤维素对映体
DOI:
10.1007/s10570-020-03512-z
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发表时间:
2020
期刊:
影响因子:
5.7
通讯作者:
Takano T.
中科院分区:
文献类型:
--
作者:
Yagura T.;Ikegami Y.;Kamitakahara H.;Takano T.
The enantiomer of natural “d-cellulose” (= “l-cellulose”), which consists ofl-glucose, was synthesized froml-glucose via cationic ring-opening polymerization.l-Glucose (1L) was converted to 3-O-benzyl-2,6-di-O-pivaloyl-β-l-glucose 1,2,4-orthopivalate (6L) by five reaction steps.l-Glucose and its derivatives showed almost the same reactivity asd-glucose and its derivatives during the synthesis of compound6L. Cationic ring-opening polymerization of compound6Lunder atmospheric pressure proceeded smoothly to give 3-O-benzyl-2,6-di-O-pivaloyl-β-l-glucopyranan (7L) with a degree of polymerization (DPn) of 32.8 (Mw/Mn= 2.19). Removal of the benzyl and pivaloyl groups of compound7Land subsequent acetylation gave acetylated β-l-glucopyranan.1H and13C NMR spectra of the acetylated β-l-glucopyranan had the same profiles as those of commercial cellulose triacetate prepared from natural cellulose, while its specific rotation was opposite, indicating the successful synthesis ofl-cellulose. The synthesizedl-cellulose had a cellulose II crystal structure. This is the first reported synthesis ofl-cellulose, anl-polysaccharide that consists of anl-monosaccharide.
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影响因子:
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影响因子:
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DOI:
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发表时间:
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期刊:
影响因子:
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1969
期刊:
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作者:
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通讯作者:
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DOI:
10.24820/ark.5550190.p010.101
发表时间:
2017
期刊:
影响因子:
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作者:
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