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Hydroxylamine was found to be a mild reagent for conversion of arylboronic acids and their pinacolyl boronate esters into phenols. This procedure works on most arylboronic acids at room temperature, yielding phenols in moderate to good yields, and efficiently on arylboronates also yielding phenols in good yields. 相似文献
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Eisuke Kaji Takashi Nishino Koji Ishige Yohei Ohya Yuko Shirai 《Tetrahedron letters》2010,51(12):1570-8420
Facile, one-pot synthesis was developed for several β(1→2)-, β(1→3)- or β(1→4)-linked disaccharides from fully unprotected methyl hexopyranosides according to the molecular recognition by arylboronic acids. The methodology was successfully applied to facile, short step assembly of the trisaccharide fragment of type II arabinogalactan. 相似文献
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In the presence of 5-10 mol% Cp*RuCl(cod), 1,6- and 1,7-diynes were allowed to react with an ethynylboronate at ambient temperature to give rise to bicyclic arylboronates in 64-93% isolated yields. 1,6-Diynes bearing a boronate terminal also underwent cycloaddition with monoalkynes to give the corresponding bicyclic arylboronates. 相似文献
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Richard L. Giles Judith A. K. Howard Leonard G. F. Patrick Michael R. Probert Gillian E. Smith Andrew Whiting 《Journal of organometallic chemistry》2003,680(1-2):257-262
A new series of boronate-amine substituted potential bifunctional catalysts have been prepared by directed lithiation of 1-N,N-dimethylnaphthalene, followed by reaction borate esters. Both diisopropyl and pincacol ester derivatives of the resulting boronates were prepared, together with a novel boroxine which shows novel N–B interactions in the crystal structure. The corresponding dimethyl-[8-(difluoroborolyl)-naphthalen-1-yl]-amine was directly accessed from the boroxine by reaction with potassium hydrogen fluoride. 相似文献
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