International Business Machines Corporation;Agency For Science, Technology And Research
发明人:
Fevre Mareva B.,Hedrick James L.,Ng Victor W. L.,Ono Robert J.,Venkataraman Shrinivas,Yang Yi Yan
申请号：
US201715436955
公开号：
US9951179(B2)
申请日:
2017.02.20
申请国别(地区):
美国
年份:
2018
代理人:
Roberts Michael R.
摘要：
Eight-membered ring cyclic carbonates having an oxygen or an acylated nitrogen at position 6 were prepared by reaction of precursor diols with ethyl chloroformate. The cyclic carbonates undergo organocatalyzed ring opening polymerization. In one instance, the initial polymer formed comprises a carbonate repeat unit having a Boc-protected nitrogen in the polymer backbone. Deprotecting the nitrogen with acid forms a cationic carbonate repeat unit having a positive charged secondary ammonium nitrogen in the polymer backbone.
