The preparation of N-carboxyanhydrides of α-amino acids using bis(trichloromethyl)carbonate
✍ Scribed by William H. Daly; Drew Poché
- Book ID
- 104217651
- Publisher
- Elsevier Science
- Year
- 1988
- Tongue
- French
- Weight
- 265 KB
- Volume
- 29
- Category
- Article
- ISSN
- 0040-4039
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✦ Synopsis
A synthesis of the N-carboxyanhydrides (NCA's) of several a-ammo acids using bis(trichloromethyl)carbonate, I, is reported.The triphosgene is used to supply phosgene in situ in stoichiometric amounts; it is particularly effective for preparing NCA's of amino acids with long, aliphatic side chains.
📜 SIMILAR VOLUMES
## Abstract In the polymerizations of alanine, γ‐ethyl glutamate, and leucine __N__‐carboxyanhydrides (NCA's) initiated by tertiary amines and some secondary amines such as __N__‐methyl‐L‐alanine dialkylamide, a stereoselectivity was observed: the polymerization rates of L‐ and D‐NCA's were identic
## Abstract Studies on copolymerization kinetics of __N__‐carboxyanhydride (NCA) of __O__‐acetyl‐L‐tyrosine (T) with NCAs of L‐valine (V) and glycine (G) were carried out in dioxane at 25°C with __n__‐butylamine as initiator. The reactivity ratios for the VT system were found to be __r__~V~:__r__~T