我们报告了通过芳基硼亲核试剂与丙二酸衍生物偶联的脱羧羰基α-芳基化。这个过程是通过有氧氧化铜催化与脱羧烯醇化物拦截的结合来实现的,这让人联想到聚酮化合物生物合成中的丙二酰辅酶 A 反应性。该方法能够合成含有与现有α-芳基化反应范式不相容的亲电官能团的乙酸单芳基酯衍生物。该反应的效用在药物中间体合成和后期功能化中得到了证明。
Silver(i)-catalyzed carboxylation of arylboronic esters with CO2
作者:Xiao Zhang、Wen-Zhen Zhang、Ling-Long Shi、Chun-Xiao Guo、Ling-Ling Zhang、Xiao-Bing Lu
DOI:10.1039/c2cc32045b
日期:——
A variety of arylboronic esters were efficiently carboxylated with CO2 using a simple AgOAc/PPh3 catalyst, affording the corresponding carboxylic acids in good yield. This simple and efficient silver(I) catalytic system showed wide functional group compatibility.
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‐Heterocyclic‐Carbene‐Coordinated Palladium Catalysts for 1,2‐Addition of Arylboron Compounds to Carbonyl Compounds
作者:Yuta Okuda、Masahiro Nagaoka、Tetsuya Yamamoto
DOI:10.1002/cctc.202001464
日期:2020.12.16
primary, secondary, and tertiary alcohols by the 1,2‐addition of arylboronic acids or boronates to carbonyl compounds, including unactivated ketones, using novel bulky yet flexible N‐heterocyclic carbene (NHC)‐coordinated 2,6‐di(pentan‐3‐yl)aniline (IPent)‐based cyclometallated palladium complexes (CYPs) as catalysts is reported. The PhS‐IPent‐CYP‐catalyzed reactions are efficient at low catalyst loadings
Copper-Catalyzed Cross-Coupling Reaction of Organoboron Compounds with Primary Alkyl Halides and Pseudohalides
作者:Chu-Ting Yang、Zhen-Qi Zhang、Yu-Chen Liu、Lei Liu
DOI:10.1002/anie.201008007
日期:2011.4.18
Non‐activated alkylelectrophiles, including alkyl iodides, bromides, tosylates, mesylates, and even chlorides, underwent copper‐catalyzedcross‐coupling with aryl boron compounds and alkyl 9‐BBN reagents (see scheme; 9‐BBN=9‐borabicyclo[3.3.1]nonane). The reactions proceed with practically useful reactivities and thus complement palladium‐ and nickel‐catalyzed Suzuki–Miyaura coupling reactions of alkyl halides
pH-Responsive N-heterocyclic carbene copper(i) complexes: syntheses and recoverable applications in the carboxylation of arylboronic esters and benzoxazole with carbon dioxide
作者:Wenlong Wang、Guodong Zhang、Rui Lang、Chungu Xia、Fuwei Li
DOI:10.1039/c3gc36830k
日期:——
developed as a green and novel strategy for homogeneous catalyst recycling, which has been successfully applied to the Cu-NHC-catalyzed carboxylation of organoboronic esters and benzoxazole with carbondioxide. Additionally, the present strategy could also be extended to the Ag-NHC-catalyzed carboxylation of terminal alkyne. The tertiary amine-functionalized catalysts could be used for at least four
activation of fluorinatedalkenes and arenes was developed. In this Pd-catalyzed Suzuki–Miyaura-type cross-coupling reaction, neither a base for enhancing the reactivity of the organoboron reagents nor a Lewis acid for promoting C–F bond activation was required. A fluoropalladium intermediate played an essential role in this reaction. In addition, a Ni(NHC) catalyst was efficient for C–C coupling through