中文名称 | 英文名称 | CAS号 | 化学式 | 分子量 |
---|---|---|---|---|
—— | 2,2,6,6-Tetramethyl-1-{1-[4-(2,5,8,11,18,21,24,27-octaoxa-tricyclo[26.4.0.012,17]dotriaconta-1(28),12(17),13,15,29,31-hexaen-14-ylmethoxymethyl)-phenyl]-ethoxy}-piperidine | 531540-01-9 | C43H61NO10 | 751.958 |
The synthesis of the trifunctionalized TEMPO-modified unimolecular initiators, unimers I, II, and III is described. Unimer I was prepared via an SN2 type Williamson ether coupling of 1,3,5-tris(iodomethyl)benzene with a TEMPO-containing ethylbenzene hydroxy derivative. The synthesis of unimer II, however, was accomplished through SN1 reaction of 1,3,5-tris(bromomethyl)benzene with the hydroxy-ethylbenzene TEMPO derivative in the presence of silver triflate. Synthesis of unimer III started from phloroglucinol and an SNAr reaction with 1-fluoro-4-nitrobenzene, followed by reduction to the amino compound and Schiff base formation with the TEMPO-derivatized aromatic aldehyde. Stable free radical polymerisation (SFRP) of styrene and acetoxystyrene with unimer I are also described with molecular weights and polydispersities reported. It is concluded that the SFRP of styrene with a triradical initiator meets the requirements of a living system.Key words: stable free radical polymerisation, starburst dendrimer, multi-armed unimolecular initiators.