Carbamate Ions as Propagating Species in N-Carboxy Anhydride Polymerizations
作者:
CharlesE. Seeney,
H.James Harwood,
期刊:
Journal of Macromolecular Science: Part A - Chemistry
(Taylor Available online 1975)
卷期:
Volume 9,
issue 5
页码: 779-795
ISSN:0022-233X
年代: 1975
DOI:10.1080/00222337508065894
出版商: Taylor & Francis Group
数据来源: Taylor
摘要:
Polymerizations of N-carboxy anhydrides of L-phenylalanine, γ-benzyl-L-glutamate, O-carbobenzoxy-L-tyrosine, L-leucine, and sarcosine, as initiated by primary, secondary, and tertiary amines in N2or CO2atmospheres and in the presence or absence of NaH, indicate that they proceed via carbamate salt intermediates. This conclusion is supported by radiotracer studies as well as by NMR studies of the initial products of NCA-amine reaction mixtures.
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