A General Method for Interconversion of Boronic Acid Protecting Groups: Trifluoroborates as Common Intermediates
作者:Quentin I. Churches、Joel F. Hooper、Craig A. Hutton
DOI:10.1021/acs.joc.5b00182
日期:2015.6.5
interconversion of diverse protected boronic acids, via intermediate organotrifluoroborates. N-Methyliminodiacetyl boronates, which have been hitherto resistant to direct conversion to trifluoroborates, have been shown to undergo fluorolysis at elevated temperatures. Subsequent solvolysis of organotrifluoroborates in the presence of trimethylsilyl chloride and a wide range of bis-nucleophiles enables
Synthesis of α-Boryl Ketones via Hydration or Oxidation of B(MIDA)-Decorated Alkynes
作者:Zhi-Hao Chen、Xiao-Xuan Su、Qingjiang Li、Jia-Qiang Wu、Tian-Miao Ou、Honggen Wang
DOI:10.1021/acs.orglett.2c04343
日期:2023.2.24
α-Boryl ketones are traditionally challenging targets in organic synthesis. Reported herein is a mild and metal-free synthesis of α-boryl ketonesvia the hydration or oxidation of N-methyliminodiacetyl boronate (B(MIDA))-decorated alkynes. A new hydration system comprised of AcCl and H2O in HFIP allows the hydration of arylethynyl B(MIDA)s at room temperature with decent functional group tolerance
Ethynyl MIDA boronate: a readily accessible and highly versatile building block for small molecule synthesis
作者:Justin R. Struble、Suk Joong Lee、Martin D. Burke
DOI:10.1016/j.tet.2010.04.020
日期:2010.6
Ethynyl N-methyliminodiacetic acid (MIDA) boronate is a very useful building block for small molecule synthesis. This compound can serve as both a bifunctional acetylene equivalent with the capacity for terminus-selective bis-functionalization and a versatile starting material for the preparation of a wide range of other MIDA boronate building blocks. (C) 2010 Elsevier Ltd. All rights reserved.
Mild Rh(III)-Catalyzed C–H Activation and Annulation with Alkyne MIDA Boronates: Short, Efficient Synthesis of Heterocyclic Boronic Acid Derivatives
Taking advantage of Rh(III)-catalyzed C-H activation reactions, we have developed a mild, short, and efficient method for the synthesis of bench-stable 3-isoquinolone MIDA boronates. The reaction is practical and scalable. The product formed has been applied in the Suzuki-Miyaura reaction with high efficiency. This strategy has also been successfully expanded to the synthesis of MIDA boronate functionalized heterocycles such as isoquinoline, pyrrole, and indole.