achieved with high chemoselectivity. In addition, several control experiments revealed that a phenolic hydroxy group was silylated much faster than a primary alcohol in both an inter- and intramolecular manner. The reactivity toward silylation under these systems might stem from the pKa of the hydroxy group.
使用N , O-双(叔丁基二甲基甲
硅烷基)乙酰胺 (BT
BSA) 和 3 mol% 的N , N-二甲基-4-
氨基吡啶N-氧化物 (
DMAPO)开发了一种有效的醇甲
硅烷基化方法。1,2
-二醇的单甲
硅烷基化成功地实现了高
化学选择性。此外,一些对照实验表明,无论是分子间还是分子内,
酚羟基的甲
硅烷基化都比伯醇快得多。在这些系统下对甲
硅烷基化的反应可能源于羟基的p Ka。