An Opportunity for Mg-Catalyzed Grignard-Type Reactions: Direct Coupling of Benzylic Halides with Pinacolborane with 10 mol % of Magnesium
作者:Christine Pintaric、Sandra Olivero、Yves Gimbert、Pierre Y. Chavant、Elisabet Duñach
DOI:10.1021/ja1052973
日期:2010.9.1
Mg in catalytic amounts as the only metal permits the reductive coupling between benzyl halides and pinacolborane. HBpin acts both as an electrophile and as a reducing agent to regenerate an organomagnesium species in situ. An hydride oxidation mechanism is proposed on the basis of DFT calculations.
PROCESS FOR PREPARING BORONIC ACIDS AND ESTERS IN THE PRESENCE OF MAGNESIUM METAL
申请人:Dunach Isabel
公开号:US20110282090A1
公开(公告)日:2011-11-17
The present invention relates to the process for preparing a boronic acid or ester chemically, in which an aromatic compound is reacted with a boronating agent, in the presence of magnesium metal (Mg
0
). The invention also relates to the boronic acids or esters that can be obtained by means of this process and to the use thereof for example as a synthesis intermediate, in the Suzuki reaction, in the pharmaceutical or alternatively electronics field.
acids, which selectivelyinhibit LMP7 while sparing all other subunits. The exploitation of structural differences between the proteasome subunits culminated in the identification of the highly potent, exquisitely selective, and orally available LMP7 inhibitor 50 (M3258). Based on the strong antitumor activity observed with M3258 in MM models and a favorable preclinical data package, a phase I clinical
蛋白酶体是泛素依赖性蛋白质降解途径中广泛表达的关键成分,其中包含具有催化活性的亚基(β1、β2 和 β5)。LMP7 (β5i) 是免疫蛋白酶体的一个亚基,是一种主要在造血细胞中表达的诱导型异构体。用于治疗多发性骨髓瘤 (MM) 的临床有效的泛蛋白酶体抑制剂非选择性靶向 LMP7 和组成型蛋白酶体和免疫蛋白酶体的其他亚基,具有相当的效力,这可能会限制这些药物的治疗适用性。在这里,我们描述了新型酰氨基硼酸的发现和基于结构的命中优化,它选择性地抑制 LMP7,同时保留所有其他亚基。对蛋白酶体亚基之间结构差异的开发最终确定了高效能,50 (M3258)。基于 M3258 在 MM 模型中观察到的强大抗肿瘤活性和有利的临床前数据包,在复发/难治性 MM 患者中启动了 I 期临床试验。
Compounds of formula (I) are inhibitors of LMP7 and can be employed, inter alia, for the treatment of an autoimmue disorder or hematological malignancies.
式(I)的化合物是LMP7的抑制剂,可用于治疗自身免疫性疾病或血液恶性肿瘤,等等。
Efficient synthesis of alkylboronic esters <i>via</i> magnetically recoverable copper nanoparticle-catalyzed borylation of alkyl chlorides and bromides
作者:Mahadev L. Shegavi、Abhishek Agarwal、Shubhankar Kumar Bose
DOI:10.1039/d0gc00677g
日期:——
report a magnetically separable Cu nanocatalyst (Fe-DOPA-Cu) for the borylation of alkyl halides with alkoxy diboron reagents, providing alkylboronic esters in high yields, with broad functional group tolerance under mild reaction conditions. The procedure is also applicable to the borylation of benzyl chlorides and bromides. Radical clock experiments support a radical-mediated process. Easy recycling of