Multistep synthesis of complex boronic acids from simple MIDA boronates.
Multistep synthesis of complex boronic acids from simple MIDA boronates.
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来自简单MIDA硼酸盐的复杂硼酸的多步合成。
DOI:
10.1021/ja8063759
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发表时间:
2008-10-29
影响因子:
15
通讯作者:
Burke MD
中科院分区:
文献类型:
--
作者:
Gillis EP;Burke MD
Due to its sensitivity to most synthetic reagents, it is typically necessary to introduce the boronic acid functional group just prior to its utilization. Overcoming this important limitation, we herein report that air- and chromatographically stable MIDA boronates are compatible with a wide range of common reagents which enables the multistep synthesis of complex boronic acid building blocks from simple B-containing starting materials. X-ray and variable temperature NMR studies link the unique stability of MIDA boronates to a kinetic inaccessibility of the potentially reactive boron p-orbital and/or nitrogen lone pair. These findings were collectively harnessed to achieve a short and modular total synthesis of (+)-crocacin C via the iterative cross-coupling of a structurally complex, MIDA-protected haloboronic acid building block.
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