Syntheses and conformational studies of poly(γ-N-alkyl-l-α,γ-diaminobutyric acids) and their carbobenzoxy derivatives
✍ Scribed by Hiroyuki Yamamoto; Miho Miyazaki; Tadao Hayakawa
- Publisher
- Elsevier Science
- Year
- 1976
- Tongue
- English
- Weight
- 518 KB
- Volume
- 17
- Category
- Article
- ISSN
- 0032-3861
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## Abstract X‐ray diagrams from oriented films and fibers of poly‐__N__^γ^‐carbobenzoxy‐L‐α,γ‐diaminobutyric acid (PCLB) and of poly‐__N__^δ^‐carbobenzoxy‐L‐ornithine (PCLO) have been examined. The conformation in the solid state for both polymers is that of an α‐helix, 18/5 for PCLB and 11/3 for P
## Abstract The helix–coil transition of poly‐γ‐__N__‐carbobenzoxy‐L‐α,γ‐diaminobutyrate (PCLB) and poly‐δ‐__N__‐carbobenzoxy‐L‐ornithine (PCLO) in chloroform–dichloroacetic acid mixtures was followed by optical rotatory dispersion. PCLB displays a “normal” temperature‐induced transition, but PCLO
## Abstract The helix–coil transitions of poly(__N__^ε^‐methyl, __N__^ε^‐carbobenzoxy‐L‐lysine), poly(__N__^δ^‐methyl, __N__^δ^‐carbobenzoxy‐L‐ornithine), and poly(__N__^δ^‐ethyl, __N__^δ^‐carbobenzoxy‐L‐ornithine) in chloroform–dichloroacetic acid and their corresponding decarbobenzoxylated polype
Several &N-alkyl basparagines were prepared from the phthalyl and benzyloxycar-bony1 derivatives. High-molecular-weight poly-&N-benzyl Lasparaghe and poly-&N-(1 )-phenethyl r.-asparagine were prepared from the corresponding N-carboxyanhydrides. From the results obtained by a study of the infrared ab