Synthesis of biodegradable polyesters by polycondensation of methyl (R)-3-hydroxybutyrate and methyl (R)-3-hydroxyvalerate
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چکیده
منابع مشابه
Production and characterization of biodegradable terpolymer poly(3-hydroxybutyrate-co-3-hydroxyvalerate-co-4-hydroxybutyrate) by Alcaligenes sp. A-04.
The production of the terpolymer poly(3-hydroxybutyrate-co-3-hydroxyvalerate-co-4-hydroxybutyrate), P(3HB-co-3HV-co-4HB), by Alcaligenes sp. A-04 was investigated to determine the superior biodegradable polymer properties over those of poly(3-hydroxybutyrate), P(3HB), and its copolymers. The highest terpolymer content of 68% (w/w) was produced by Alcaligenes sp. A-04 at 60 h by shake-flask cult...
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The microbial degradation of tensile test pieces made of poly(3-hydroxybutyrate) [P(3HB)] or a copolymer of 90% 3-hydroxybutyric acid and 10% 3-hydroxyvaleric acid was studied in soils incubated at a constant temperature of 15, 28, or 40 degrees C for up to 200 days. In addition, hydrolytic degradation in sterile buffer at temperatures ranging from 4 to 55 degrees C was monitored for 98 days. D...
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According to the principles of the methodology of bioisosteric replacements a series of methyl 1-R-4-methyl-2,2-dioxo-1H-2λ⁶,1-benzothiazine-3-carboxylates has been obtained as potential analgesics. In addition, a fundamentally new strategy for the synthesis of compounds of this chemical class involving the introduction of N-alkyl substituent at the final stage in 2,1-benzothiazine nucleus alre...
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The reaction between methyl (R)-2-(2-chloro-phen-yl)-2-hy-droxy-acetate and 3-nitro-benzene-sulfonyl chloride gave the title compound, C(15)H(12)ClNO(7)S, which is a promising inter-mediate for the synthesis of Clopidrogel, an anti-platelet drug used in the prevention of strokes and heart attacks. In the crystal, mol-ecules are linked through C-H⋯O interactions, and there is also a short Cl⋯O c...
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Transmembrane ion transport, a critical process in providing energy for cell functions, is carried out by pore-forming macromolecules capable of discriminating among very similar ions and responding to changes in membrane potential. It is widely regarded that ion channels are exclusively proteins, relatively late arrivals in cell evolution. Here we discuss the formation of ion-selective, voltag...
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ژورنال
عنوان ژورنال: Macromolecular Rapid Communications
سال: 1994
ISSN: 1022-1336,1521-3927
DOI: 10.1002/marc.1994.030150509