𝔖 Bobbio Scriptorium
✦   LIBER   ✦

Asymmetric selection in the copolymerization of N-carboxy-L- and D-alanine anhydride

✍ Scribed by Teiji Tsuruta; Shohei Inoue; Kazuo Matsuura

Publisher
Wiley (John Wiley & Sons)
Year
1967
Tongue
English
Weight
272 KB
Volume
5
Category
Article
ISSN
0006-3525

No coin nor oath required. For personal study only.

✦ Synopsis

TiAZUO AIATSUURA, Department oJ Synthetic Phfvt~isiiy, Faculty oJ Engineering, T 'niversily o j Tokyo, Bunkyo-ku, Tolip, .Japan

Synopsis

The copolymerization of N-carboxy-1,-arid o-alaniiie anhydride with methanol :ts initiator was carried out. The eiiantiomer excess in the starting monomer mixtrire is preferentially incorporated into polymer chains, demonstrating asymmetric selection diiring the 1)-and L-copolymerization. The mechanism of asymmetric-selective polymerization of a-amino acid NCA is discussed iii terms of the stereoregiilation by molecular asgmmetry of the growing polymer chain.

📜 SIMILAR VOLUMES

Stereochemistry of the D and L copolymer
Stereochemistry of the D and L copolymerization of valine N-carboxyanhydride
✍ Toshihiro Akaike; Yukio Aogaki; Shohei Inoue 📂 Article 📅 1975 🏛 Wiley (John Wiley & Sons) 🌐 English ⚖ 343 KB

## Abstract In the D and L copolymerization of valine __N__‐carboxyanhydride (NCA) with various D/L ratios initiated by __n__‐butylamine, the stereoselection of monomer NCA by the growing polymer chains, which take a β‐like conformation, does not take place. This result is in remarkable contrast to

Spontaneous copolymerization of maleic a
Spontaneous copolymerization of maleic anhydride and N-vinylimidazole in 1,4-dioxane. I. Charge transfer complexation and kinetics of the copolymerization
✍ C. Göksel; B. Hacioğlu; U. Akbulut 📂 Article 📅 1997 🏛 John Wiley and Sons 🌐 English ⚖ 187 KB 👁 3 views

Maleic anhydride (MAH) and N-vinylimidazole (NVIM) were found to form a charge transfer complex in 1,4-dioxane. The equilibrium constant, K, of the complex and its composition were calculated from the modified Benesi-Hildebrand equation by using UV spectrophotometry. Spontaneous copolymerization of

Infrared spectra of the N-acetyl-N′-meth
Infrared spectra of the N-acetyl-N′-methylamides of glycine, L-alanine, and L-leucine in dilute solutions of chloroform and carbon tetrachloride
✍ F. R. Maxfield; S. J. Leach; E. R. Stimson; S. P. Powers; H. A. Scheraga 📂 Article 📅 1979 🏛 Wiley (John Wiley & Sons) 🌐 English ⚖ 814 KB

## Abstract We have examined the NH stretching frequencies of __N__‐acetyl‐__N′__‐methyl‐L‐alanineamide (blocked Ala), __N__‐acetyl‐__N′__‐methylglycineamide (block Gly), and __N__‐acetyl‐__N′__‐methyl‐L‐leucineamide (blocked Leu) in chloroform using irspectroscopy. Their spectrum of blocked Leu in