Synthesis of 1,3-enynes via Suzuki-type reaction of vinylic tellurides and potassium alkynyltrifluoroborate salts
摘要:
The palladium-catalyzed cross-coupling reaction between potassium alkynyltrifluoroborate salts and vinylic tellurides proceeds readily to afford 1,3-enynes with moderate to good yields. (C) 2004 Elsevier Ltd. All rights reserved.
Differentiation and assignment of vinyl telluride regioisomers by <sup>1</sup>
H-<sup>125</sup>
Te <i>g</i>
HMBC
作者:Juliano C. R. Freitas、Dayvson J. Palmeira、Roberta A. Oliveira、Paulo H. Menezes、Ricardo O. Silva
DOI:10.1002/mrc.3826
日期:2012.7
Complete (1) H, (13) C, and (125) Te NMR spectral data for some vinyltellurides are described. The (1) H-(125) Te gHMBC experiment was used for the complete chemical shift assignment and structure elucidation of a mixture of regioisomers. The assignment ((125) Te NMR) and coupling constants (J(H,H) ) for all regioisomers are described for the first time.
Study of the Regioselectivity in the Hydrotelluration of Hydroxy Alkynes
作者:HÉLio A. Stefani、Lincoln D.G. Cardoso、ClaudÉTe J. Valduga、Gilson Zeni
DOI:10.1080/10426500108046647
日期:2001.5
Influence of different protecting groups on the regioselectivity of the hydrotelluration reaction of hydroxy alkynes
作者:Juliana M. Oliveira、Dayvson J. Palmeira、João V. Comasseto、Paulo H. Menezes
DOI:10.1590/s0103-50532010000200024
日期:——
The influence of protecting groups on the synthesis of regio- and stereodefined vinyl tellurides derived from the reaction of BuTeNa and propargylic- or homo-propargylic alcohols showed that TIPS silyl ether is useful as a regiodirecting group. The application of the methodology to the synthesis of a fragment of (+/-)-Seselidiol, a natural product, demonstrated the applicability of the new methodology.
Palladium-catalyzed cross-coupling of vinylic tellurides and potassium vinyltrifluoroborate salt: synthesis of 1,3-dienes
作者:Rodrigo Cella、Aline T.G. Orfão、Hélio A. Stefani
DOI:10.1016/j.tetlet.2006.05.088
日期:2006.7
Here we report an ultrasound-assisted synthesis of stereodefined 1,3-dienes by Suzuki-Miyaura cross-coupling reactions of vinylic tellurides and potassium beta-styryl trifluoroborate salt. (c) 2006 Elsevier Ltd. All rights reserved.