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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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NEW MEASUREMENT OF HYDROGEN GAS AND ACETONE VAPOR IN GASES EMANATING FROM HUMAN SKIN
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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