作者:Agaeva、Mankaev、Lyssenko、Egorov、Karlov
DOI:10.1007/s11172-024-4237-3
日期:——
X-ray diffraction data (for stannylenes 1h—m are monomeric; the coordination number of the tin atom is 3. Stannylenes 1h—m were tested as initiators for the ε-caprolactone polymerization. The highest activity was shown by derivatives 1l,m containing phenyl groups at the terminal nitrogen atoms of the ligand. Stannylenes 1h—k containing ethyl and benzyl substituents are less active in the ring-opening polymerization
1,4,7-三取代1,4,7-三氮杂庚烷衍生物RN(CH 2 CH 2 NHR') 2 与1当量的反应拉珀特的亚锡基 Sn[N(SiMe 3 ) 2 ] 2 得到相应的亚锡基 RN(CH 2 CH 2 Sn (R′ = Bn, R = Et (1h), Bn (1i); R′ = Et, R = Et (1j), Bn (1k); R′ = Ph, R = Et (1l), Bu t (1m)) 收率令人满意。根据 1 H、 13 C(1h—m)和 119 Sn(1i,k—m)NMR数据和X-射线衍射数据(亚锡基 1h—m 是单体;锡原子的配位数为 3。亚锡基 1h—m 被测试作为 ε-己内酯聚合的引发剂。含有苯基的衍生物 1l,m 显示出最高的活性在配体的末端氮原子上,含有乙基和苄基取代基的亚锡基1h-k在ε-己内酯的开环聚合中活性较低。