## Abstract The mutarotation between form I and form II of poly(__cis__‐5‐ethyl‐D‐proline) has been experimentally realized. A number of hydrogen‐bond‐forming solvents have been found effective in initiating the mutarotational process. The rate of mutarotation seems to be proportional to the acidit
Synthesis, characterization, and solution properties of 5-ethyl-substituted poly(L-prolines). Synthesis of cis- and trans-5-ethyl-L-proline and optically active poly(cis-5-ethyl-D-proline)
✍ Scribed by Yang, Wayne W.-Y. ;Overberger, C. G. ;Venkatachalam, C. M.
- Publisher
- John Wiley and Sons
- Year
- 1983
- Weight
- 794 KB
- Volume
- 21
- Category
- Article
- ISSN
- 0360-6376
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📜 SIMILAR VOLUMES
## Abstract Two possible conformations for poly(__cis__‐5‐ethyl‐D‐proline) have been identified and characterized by using combinations of ^1^H‐ and ^13^C‐NMR, CD, and ORD spectroscopic techniques. Both forms have helical conformations similar to those of poly(L‐proline) characterized by different
Pyroglutamic acid derivative (I) is proved to be an excellent chiral starting compound for the synthesis of title amino acids (IX), (X), and (V). The syntheses are based on a combination of methods previously used for the preparation of 4-and 5-substituted prolines. These methods are the ring openin