摘要:
A branched polyamine comprises about 45 to about 70 backbone tertiary amine groups, about 90 to about 140 backbone secondary amine groups, a positive number n′ greater than 0 of backbone terminating primary amine groups, and a positive number q greater than 0 of backbone terminating carbamate groups of formula (2): wherein (n′+q) is a number equal to about 45 to about 70, the starred bond of formula (2) is linked to a backbone nitrogen of the branched polyamine, L′ is a divalent radical comprising 3 to 30 carbons, and q/(n′+q)×100% equals about 9% to about 47%.
摘要:
A branched polyamine comprises about 45 to about 70 backbone tertiary amine groups, about 90 to about 140 backbone secondary amine groups, a positive number n′ greater than 0 of backbone terminating primary amine groups, and a positive number q greater than 0 of backbone terminating carbamate groups of formula (2): wherein (n′+q) is a number equal to about 45 to about 70, the starred bond of formula (2) is linked to a backbone nitrogen of the branched polyamine, L′ is a divalent radical comprising 3 to 30 carbons, and q/(n′+q)×100% equals about 9% to about 47%.
摘要:
A process of the present invention is directed toward conducting highly selective, high yield post-polymerization reactions on polypeptides to prepare functionalized polypeptides. In certain embodiments, the polypeptides can be prepared by ring opening polymerization of N-carboxyanhydrides. In certain embodiments, the post-polymerization reaction is a “click chemistry” reaction. In certain embodiment, the “click chemistry” reaction is a triazole-forming reaction involving an alkyne on the polypeptide and an azide.
摘要:
A branched polyamine comprises about 8 to about 12 backbone tertiary amine groups, about 18 to about 24 backbone secondary amine groups, a positive number n′ greater than 0 of backbone terminating primary amine groups, and a positive number q greater than 0 of backbone terminating carbamate groups of formula (2): wherein (n′+q) is a number equal to about 8 to about 12, the starred bond of formula (2) is linked to a backbone nitrogen of the branched polyamine, L′ is a divalent linking group comprising 3 to 30 carbons, and q/(n′+q)×100% equals about 9% to about 40%.
摘要:
A process of the present invention is directed toward conducting highly selective, high yield post-polymerization reactions on polypeptides to prepare functionalized polypeptides. In certain embodiments, the polypeptides can be prepared by ring opening polymerization of N-carboxyanhydrides. In certain embodiments, the post-polymerization reaction is a “click chemistry” reaction. In certain embodiment, the “click chemistry” reaction is a triazole-forming reaction involving an alkyne on the polypeptide and an azide.
摘要:
A branched polyamine comprises about 8 to about 12 backbone tertiary amine groups, about 18 to about 24 backbone secondary amine groups, a positive number n′ greater than 0 of backbone terminating primary amine groups, and a positive number q greater than 0 of backbone terminating carbamate groups of formula (2): wherein (n′+q) is a number equal to about 8 to about 12, the starred bond of formula (2) is linked to a backbone nitrogen of the branched polyamine, L′ is a divalent linking group comprising 3 to 30 carbons, and q/(n′+q)×100% equals about 9% to about 40%.
摘要:
A composite hydrogel comprises an amphiphilic triblock copolymer (ABA) and a loaded micelle bound by noncovalent interactions. The loaded micelle comprises a biologically active substance and an amphiphilic diblock copolymer (CD). The A blocks comprise a steroidal repeat unit (repeat unit 1) having both a backbone carbonate and a side chain bearing a steroid functional group. Each of the A blocks has a degree of polymerization of about 0.5 to about 4.0. The B block comprises a first poly(alkylene oxide) backbone. The C block comprises a second poly(alkylene oxide) backbone. The D block comprises a steroidal repeat unit (repeat unit 2) having both a backbone carbonate group and a side chain comprising a steroid functional group. The composite hydrogel is capable of controlled release of the biologically active substance.