Selective derivatization of oxime-blocked tolylene-2,4-diisocyanate

Selective derivatization of oxime-blocked tolylene-2,4-diisocyanate
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肟封闭甲苯-2,4-二异氰酸酯的选择性衍生化

DOI:
10.1016/j.cclet.2013.06.013
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发表时间:
2013-11
影响因子:
9.1
通讯作者:
uo Li*
uo Li*
中科院分区:
化学1区
文献类型:
--
作者:
Yang Sang, Pengfei Yang, Ti;uo Li*

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观察到环己酮肟封端的甲苯-2,4-二异氰酸酯(2,4-TDI)与氨基硅氧烷的选择性反应,其中胺能够区分2,4-TDI分子中的两个反应基团。合成了2-叔丁基二甲基硅氧乙基脲-4-环己酮肟氨基甲酸甲撑酯,并通过单晶X-射线衍射确定了其精确结构。此外,肟封端的异氰酸酯在乙醇胺中可选择性地与单键NH_2基团反应,而单键OH基团不受保护。
A selective reaction of cyclohexanone oxime-blocked tolylene-2,4-diisocyanate (2,4-TDI) with amino siloxane was observed, in which amines were capable of discriminating two reactive groups in the 2,4-TDI molecule. Thus, tolylene-2-tert-butyldimethylsilyloxyethyl carbamide-4-cyclohexanone oxime carbamate was synthesized and its precise structure was determined by single-crystal X-ray diffraction. Moreover, it was found that oxime-blocked isocyanate could react selectively with the single bondNH2group with the single bondOH group unprotected in ethanolamine.
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