Copper(II) bromide as efficient catalyst for silyl- to bisarylmethyl ethers interconversion (transprotection)
摘要:
Primary and secondary silylated alcohols are easily converted to bis(methoxyphenyl)methyl (BMPM) ethers in good yields using CuBr2 as catalyst in acetonitrile at room temperature. Various other protecting groups are compatible with this mild and convenient process. (C) 2011 Elsevier Ltd. All rights reserved.
Rapid Assessment of Protecting-Group Stability by Using a Robustness Screen
作者:Karl D. Collins、Andreas Rühling、Fabian Lied、Frank Glorius
DOI:10.1002/chem.201304508
日期:2014.3.24
establish the stability of widely utilized silyl, acetal, and carbamateprotectinggroups to a given set of reaction conditions. Assessment of up to twelve protectinggroups in a single experiment has been demonstrated. Evaluation of this protocol in two unrelated synthetic transformations suggests that this method can be used to select appropriate protectinggroups in the design of synthetic routes.