Formation of Aromatic
<i>O</i>
‐Silylcarbamates from Aminosilanes and Their Subsequent Thermal Decomposition with Formation of Isocyanates
作者:Franziska Gründler、Henrik Scholz、Marcus Herbig、Sandra Schwarzer、Jörg Wagler、Edwin Kroke
DOI:10.1002/ejic.202100118
日期:2021.6.21
(O-silylcarbamates), i. e., compounds with the general motif R1R2N−CO−O−SiR3R4R5 as potential precursors. We focused on the insertion reaction of CO2 into Si−N bonds of substrates with cyclic (mostly aromatic) amine substituents, i. e., PhNHSiMe3, (PhNH)2SiMe2, PhCH2NHSiMe3, p-(MeO)C6H4NHSiMe3, o-C6H4(NHSiMe3)2, 1,2-C6H10(NHSiMe3)2, o-C6H4(NHSiMe3)(CH2NHSiMe3) and 1,8-C10H6(NHSiMe3)2. Compared to previously
一种新的无光气制备不同异氰酸酯的途径是从 CO 2和氨基硅烷(参见甲硅烷基胺)开始形成所谓的氨基甲酰氧基硅烷(O-甲硅烷基氨基甲酸酯),即。例如,具有通用基序R 1 R 2 N-CO-O-SiR 3 R 4 R 5作为潜在前体的化合物。我们专注于 CO 2插入具有环状(主要是芳香族)胺取代基的底物的 Si-N 键中的插入反应,即。例如,PhNHSiMe 3、(PhNH) 2 SiMe 2、PhCH 2 NHSiMe 3、p-(MeO)C 6 H 4 NHSiMe 3, oC 6 H 4 (NHSiMe 3 ) 2 , 1,2-C 6 H 10 (NHSiMe 3 ) 2 , oC 6 H 4 (NHSiMe 3 )(CH 2 NHSiMe 3 ) 和 1,8-C 10 H 6 (NHSiMe 3 ) 3)2。与之前研究的氨基硅烷相比,由于 N 原子的亲核性/碱性降低,这些反应受到阻碍。而略有增加的