P1 Phenethyl peptide boronic acid inhibitors of HCV NS3 protease
摘要:
A series of peptide boronic acids containing extended, hydrophobic P1 residues was prepared to probe the shallow, hydrophobic S1 region of HCV NS3 protease. The p-trifluoromethylphenethyl P1 substituent was identified as optimal with respect to inhibitor potency for NS3 and selectivity against elastase and chymotrypsin. (C) 2002 Published by Elsevier Science Ltd.
Ni-Catalyzed Reductive Allylation of α-Chloroboronates to Access Homoallylic Boronates
作者:Yixian Lou、Jian Qiu、Kai Yang、Feng Zhang、Chenglan Wang、Qiuling Song
DOI:10.1021/acs.orglett.1c01213
日期:2021.6.18
transition-metal-catalyzed allylation reaction is an efficient strategy for the construction of new carbon–carbon bonds alongside allyl or homoallylic functionalization. Herein we describe a Ni-catalyzed reductive allylation of α-chloroboronates to efficiently render the corresponding homoallylic boronates, which could be readily converted into valuable homoallylic alcohols or amines or 1,4-diboronates
过渡金属催化的烯丙基化反应是在烯丙基或均烯丙基官能化的同时构建新碳-碳键的有效策略。在本文中,我们描述了 α-氯硼酸酯的 Ni 催化还原烯丙基化,以有效地生成相应的高烯丙基硼酸酯,其可以很容易地转化为有价值的高烯丙基醇或胺或 1,4-二硼酸酯。该反应具有广泛的底物范围和良好的官能团兼容性,是对现有制备高烯丙基硼酸酯方法的补充。
Ni-Catalyzed Radical-Promoted Defluoroalkylborylation of Trifluoromethyl Alkenes To Access <i>gem</i>-Difluorohomoallylic Boronates
作者:Jian Qiu、Cece Wang、Lu Zhou、Yixian Lou、Kai Yang、Qiuling Song
DOI:10.1021/acs.orglett.2c00800
日期:2022.4.1
gem-difluoroalkenes and organoboroncompounds. However, the strategies for the construction of gem-difluorohomoallyl boronates has scarcely been described. Herein, we develop an efficient protocol for the construction of gem-difluorohomoallylic boronates through a Ni-catalyzed radical-promoted defluoroalkylborylation of α-trifluoromethyl alkenes with α-haloboronates under mild conditions. This reaction features a
gem -Difluoroalkenyl boronates 是用于构建各种gem -difluoroalkenes和有机硼化合物的有吸引力的合成子。然而,几乎没有描述构建偕二氟高烯丙基硼酸酯的策略。在此,我们开发了一种有效的方案,用于在温和条件下通过 Ni 催化的自由基促进的 α-三氟甲基烯烃与 α-卤代硼酸酯的脱氟烷基硼酸化来构建偕二氟高烯丙基硼酸酯。该反应具有广泛的底物范围、良好的官能团耐受性和多种转化。
Iridium-Catalyzed Chemoselective and Enantioselective Hydrogenation of (1-Chloro-1-Alkenyl) Boronic Esters
作者:Ivana Gazić Smilović、Eva Casas-Arcé、Stephen J. Roseblade、Ulrike Nettekoven、Antonio Zanotti-Gerosa、Miroslav Kovačevič、Zdenko Časar
DOI:10.1002/anie.201106262
日期:2012.1.23
Persistent chlorine: Hydrogenation of borolane‐substituted vinylic chlorides catalyzed by IrP N complexes greatly preserved the chlorine substituent on the hydrogenated product, with only 3–19 % of dechlorinated byproducts present after hydrogenation. The α‐chloro boronicester products are ideal precursors for proteasome‐inhibitor‐type anti‐cancer drugs, a fact which demonstrates the utility of this
持久性氯:由铱催化的环戊硼烷-取代的乙烯基氯化物的加氢 P N络合物大大保留在氢化产物的氯取代基,只有3-19%氢化后存在的脱氯副产物。α-氯硼酸酯产品是蛋白酶体抑制剂型抗癌药物的理想前体,这一事实证明了这种氢化方法的实用性。
Synthesis of α-Haloboronates by the Halogenation of <i>gem</i>-Diborylalkanes via Tetracoordinate Boron Species
作者:Shangteng Liao、Jinchao Liang、Chaokun Li、Nan Chen、Kai Yang、Jinglong Chen、Qiuling Song
DOI:10.1021/acs.orglett.3c00982
日期:2023.4.28
applications in organic chemistry as synthetic synthons; however, traditional synthetic methods of α-haloboronates are harsh and complicated. Herein, we used nBuLi as the nucleophilic reagent to attack the boron atom in gem-diborylalkanes to form tetracoordinate boron species and successfully achieved α-chloroboronates and α-bromoboronates with readily accessible electrophilichalogen reagents (NCS and