Stereoselective formation of trisubstituted vinyl boronate esters by the acid-mediated elimination of α-hydroxyboronate esters.

Stereoselective formation of trisubstituted vinyl boronate esters by the acid-mediated elimination of α-hydroxyboronate esters.
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DOI:
10.1021/jo500773t
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发表时间:
2014-08-01
期刊:
The Journal of organic chemistry
影响因子:
--
通讯作者:
Clark TB
Clark TB
中科院分区:
其他
文献类型:
--
作者:
Guan W;Michael AK;McIntosh ML;Koren-Selfridge L;Scott JP;Clark TB

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The copper-catalyzed diboration of ketones followed by an acid-catalyzed elimination leads to the formation of 1,1-disubstituted and trisubstituted vinyl boronate esters with moderate to good yields and selectivity. Addition of tosic acid to the crude diboration products provides the corresponding vinyl boronate esters upon elimination. The trisubstituted vinyl boronate esters are formed as the (Z)-olefin isomer, which was established by subjecting the products to a Suzuki–Miyaura coupling reaction to obtain alkenes of known geometry.
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