Microwave-mediated synthesis of N-methyliminodiacetic acid (MIDA) boronates
摘要:
A library of over 20, mainly aryl or heteroaryl, N-methyliminodiacetic acid (MIDA) boronates have been synthesised. A rapid microwave-mediated (MW) method (5-10 min) has been developed using polyethylene glycol 300 (PEG 300) as solvent. However, acetonitrile (MeCN) and dimethylformamide (DMF) were found to be alternative solvents, the latter especially for 2-substituted aryl boronic acids. Crown Copyright (C) 2014 Published by Elsevier Ltd. All rights reserved.
Microwave-mediated synthesis of N-methyliminodiacetic acid (MIDA) boronates
作者:Adam J. Close、Paul Kemmitt、Matthew K. Emmerson、John Spencer
DOI:10.1016/j.tet.2014.09.044
日期:2014.11
A library of over 20, mainly aryl or heteroaryl, N-methyliminodiacetic acid (MIDA) boronates have been synthesised. A rapid microwave-mediated (MW) method (5-10 min) has been developed using polyethylene glycol 300 (PEG 300) as solvent. However, acetonitrile (MeCN) and dimethylformamide (DMF) were found to be alternative solvents, the latter especially for 2-substituted aryl boronic acids. Crown Copyright (C) 2014 Published by Elsevier Ltd. All rights reserved.
<i>gem</i>
-Difluorination of Alkenyl <i>N</i>
-methyliminodiacetyl Boronates: Synthesis of α- and β-Difluorinated Alkylborons
作者:Wen-Xin Lv、Qingjiang Li、Ji-Lin Li、Zhan Li、E Lin、Dong-Hang Tan、Yuan-Hong Cai、Wen-Xin Fan、Honggen Wang
DOI:10.1002/anie.201810204
日期:2018.12.10
chemical transformations. Reported herein is a migratory geminal difluorination of aryl‐substituted alkenylN‐methyliminodiacetyl (MIDA) boronates using commercially available Py⋅HF as the fluorine source and hyperiodine as the oxidant. The protocol offers facile access to α‐ and β‐difluorinated alkylboron compounds, both of which have previously been challenging to prepare. Mild reaction conditions, broad