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Direct dehydration polycondensation of lactic acid catalyzed by water‐stable Lewis acids
Poly(L-lactic acid) (PLLA) is generally produced by ring-opening polymerization of (S,S)-lactide, which is prepared from dehydration polycondensation of lactic acid and successive depolymerization.Expand
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Melt spinning of poly(L-lactic acid) and its biodegradability
The melt spinning and melt drawing of poly(L-lactic acid) (PLLA) were carried out with a meltspinning machine, and the mechanical properties, structure, and biodegradability of PLLA fiber wereExpand
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Asymmetric epoxidation of alpha-olefins having neighboring sugar chiral templates and alternating copolymerization with dicarboxylic anhydrides.
Sugar-substituted epoxides 5-8 were synthesized by asymmetric epoxidation (in CH(2)Cl(2)/water) of alpha-olefins having neighboring sugars (1-4) by use of an achiral oxidant (MCPBA), in which theExpand
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Amphiphilic Poly(ε-caprolactone)–Poly(vinyl alcohol) Block Copolymer: Preparation from a Bifunctional Initiator
Synthesis of a new block copolymer, Poly(ε-caprolactone)-block-Poly(vinyloxytriethylsilane) (PCL-b-PVOTES) was examined by using a bifunctional initiator 4-(2-Hydroxyethoxy)benzaldehyde (4-HEBA) orExpand
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Noncovalent domino effect on helical screw sense of chiral peptides possessing C-terminal chiral residue.
Recently, a novel chiral intermolecular interaction was found in an N-deprotected achiral nonapeptide that undergoes the predominance of one-handed screw sense through the addition of chiral smallExpand
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Terminal effect of chiral residue on helical screw sense in achiral peptides
To understand the terminal effect of chiral residue for determining a helical screw sense, we adopted five kinds of peptides I–V containing N- and/or C-terminal chiral Leu residue(s):Expand
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Synthesis and conformational study of peptides possessing helically arranged ΔZPhe side chains
Z‐Dehydrophenylalanine (ΔzPhe) possessing four oligopeptides, Boc‐(L‐Ala‐ΔzPhe‐Aib)n‐OCH3 (n = 1–4: Boc, t‐butoxycarbonyl; Aib, α‐aminoisobutyric acid), were synthesized, and their solutionExpand
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Synthesis of ΔEPhe-containing tripeptide via photoisomerization and its conformation in solution
A new synthetic route to (E)-beta-phenyl-alpha,beta-dehydroalanine (delta(E)Phe)-containing peptide was presented via photochemical isomerization of the correspondingExpand
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ABSTRACT We have found that hydrogen gas and acetone vapor emanate from human skin. Emanation gases from human skin were collected for 5–10 min from arm, palm, or forefinger with a homemade probe andExpand
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