Citation:
Yang Sang, Peng-Fei Yang, Tian-Duo Li. Selective derivatization of oxime-blocked tolylene-2,4-diisocyanate[J]. Chinese Chemical Letters,
;2013, 24(11): 1019-1022.
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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-NH2 group with the-OH group unprotected in ethanolamine.
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