Vicinal Diboration of Alkyl Bromides via Tandem Catalysis
作者:Xiao-Xu Wang、Lei Li、Tian-Jun Gong、Bin Xiao、Xi Lu、Yao Fu
DOI:10.1021/acs.orglett.9b01481
日期:2019.6.7
Vicinal diboration of alkylbromides via tandem catalysis is reported. The reported reaction exhibits a broad substrate scope, good functional group compatibility, and regioselectivity. Moreover, it shows good practicality due to the easy accessibility of alkylbromides in combination with diverse transformations of diboronates. Mechanism study indicates that terminal alkenes are generated selectively
Electrochemical Borylation of Alkyl Halides: Fast, Scalable Access to Alkyl Boronic Esters
作者:Bingbing Wang、Pan Peng、Wan Ma、Zhao Liu、Cheng Huang、Yangmin Cao、Ping Hu、Xiaotian Qi、Qingquan Lu
DOI:10.1021/jacs.1c06473
日期:2021.8.25
Herein, a fast, scalable, and transition-metal-free borylation of alkyl halides (X = I, Br, Cl) enabled by electroreduction is reported. This process provides an efficient and practical access to primary, secondary, and tertiary boronic esters at a high current. More than 70 examples, including the late-stage borylation of natural products and drug derivatives, are furnished at room temperature, thereby
alkynes and alkenes undersolvent‐ and ligand‐freeconditions in air. The cis‐1,2‐diborylalkenes and 1,2‐diborylalkanes were obtained in moderate to excellent yields following, in most cases, a simple filtration workup protocol. The versatility of the cis‐1,2‐diboronvinyl compounds was demonstrated in a series of organic transformations, including the Suzuki–Miyauracrosscoupling and the boron–halogen
[EN] METHODS FOR PREPARING A BORONIC ACID OR A BORONIC ESTER<br/>[FR] PROCÉDÉS DE PRÉPARATION D'UN ACIDE BORONIQUE OU D'UN ESTER BORONIQUE
申请人:UNIV BRISTOL
公开号:WO2018189157A1
公开(公告)日:2018-10-18
Methods are disclosed for converting a carboxylic acid by using a diboron reagent to convert the carboxylic acid or imide ester derivative of a carboxylic acid to a boronic ester. The method may involve providing an imide ester, such as a phthalimide ester, of a carboxylic acid, and treating the imide ester with a diboron reagent, thereby forming a boronic ester. The diboron reagent may be selected from bis(catecholato)diboron, B2(OH)4 or a mixture thereof, optionally in the presence of catechol.
Nickel(<scp>ii</scp>)-catalyzed highly selective 1,2-diborylation of non-activated monosubstituted alkenes
作者:Zhi-Kai Zhang、Ya-Li Feng、Zheng Ruan、Yuan-Qing Xu、Zhong-Yan Cao、Meng-Hua Li、Chao Wang
DOI:10.1039/d2cc04382c
日期:——
A practical method for 1,2-diborylation of non-activated monosubstituted alkenes via nickel catalysis has been developed. The protocol features high functional group tolerance and can be applied for the formal synthesis of drugs and modification of natural product derivatives. Preliminary mechanistic studies imply the involvement of a Ni(II) catalytic cycle.
开发了一种通过镍催化对非活化单取代烯烃进行 1,2-二硼化的实用方法。该方案具有高官能团耐受性,可用于药物的正式合成和天然产物衍生物的修饰。初步的机理研究暗示了 Ni( II ) 催化循环的参与。