A metal‐free radical borylation of alkyl and aryl iodides with bis(catecholato)diboron (B2cat2) as the boron source under mild conditions is introduced. The borylation reaction is operationally easy to conduct and shows high functional group tolerance and broad substrate scope. Radical clock experiments and density functional theory calculations provide insights into the mechanism and rate constants
介绍了在温和条件下以双(儿茶酚)二硼(B 2 cat 2 )作为硼源对烷基碘化物和芳基碘化物进行金属自由基硼化反应。硼化反应操作简便,具有较高的官能团耐受性和广泛的底物范围。自由基时钟实验和密度泛函理论计算提供了对 B 2 cat 2的 C 自由基硼化的机制和速率常数的见解。
Reactions of catecholborane with Wilkinson's catalyst: implications for transition metal-catalyzed hydroborations of alkenes
作者:Kevin Burgess、Wilfred A. Van der Donk、Stephen A. Westcott、Todd B. Marder、R. Thomas Baker、Joseph C. Calabrese
DOI:10.1021/ja00050a015
日期:1992.11
Reactions of catecholborane (HBO 2 C 6 H 4 ) with RhCl(PPh 3 ) 3 (1) yield a variety of products depending on the B/Rh ratio, solvent, and temperature. Of particular relevance to catalyzed alkenehydroboration is degradation of HBO 2 C 6 H 4 to B 2 (O 2 C 6 H 4 ) 3 /«BH 3 » and the dihydride RhH 2 Cl(PPh 3 ) 3 (3). The molecular structure of 3, determined by X-ray diffraction, has meridional phosphine
儿茶酚硼烷 (HBO 2 C 6 H 4 ) 与 RhCl(PPh 3 ) 3 (1) 的反应会根据 B/Rh 比、溶剂和温度产生多种产物。与催化的烯烃硼氢化特别相关的是 HBO 2 C 6 H 4 降解为 B 2 (O 2 C 6 H 4 ) 3 /«BH 3 » 和二氢化物 RhH 2 Cl(PPh 3 ) 3 (3)。3的分子结构,由X射线衍射确定,具有经向膦配体和顺式氢化物
A new mild radical route to 3-substituted maleimides using organoboroles
作者:Peter Birch、Andrew F. Parsons、Paul Cross
DOI:10.1016/j.tetlet.2011.12.012
日期:2012.2
A new, mild, radical route for the synthesis of 3-substituted maleimides has been developed. This new method incorporates alkene hydroboration, conjugate addition-aminoxylation and TEMPO-H elimination in a one-pot procedure, using cheap, readily available starting materials. A variety of 3-substituted maleimides have been prepared in good to excellent yield.
A facile one-pot synthesis of alkylarylcarbinols from α,α-dichloroarylmethanes and trialkylboranes in the presence of magnesium or lithium
作者:Nan-Sheng Li、Su Yu、George W. Kabalka
DOI:10.1016/s0022-328x(96)06722-8
日期:1997.3
α-Chlorobenzylmagnesium chloride or α-chlorobenzyllithium generated from α,α-dichloroarylmethane and magnesium or lithium, reacts in situ with trialkylboranes in THF at room temperature to produce the corresponding alkylarylcarbinols in good yields after oxidation with sodium perborate.