随着对绿色化学和可持续发展的日益关注,人们对寻找更绿色的有机合成方法和来源产生了浓厚的兴趣。然而,大多数有机转化都不可避免地涉及有毒添加剂或溶剂。在此,我们首先报道了直接利用太阳能、空气作为氧化剂和水作为溶剂选择性裂解 C 的组合。C 芳基烯烃中的双键。各种 α-甲基苯乙烯、二芳基烯烃以及末端苯乙烯在这种绿色和可持续的策略中具有良好的耐受性,并以令人满意的收率提供所需的羰基产品。与多相催化一样,这种均相催化体系也可以重复使用,重复3次后仍能保持良好的活性。机理研究表明,O 2 ˙ -和1 O 2都参与了反应。基于这些结果,提出了两种可能的机制,包括电子转移途径和能量转移途径。
methodologies and occurs through a trifluoroacyl radical mechanism promoted by a photocatalyst, which triggers a C−O bond fragmentation. Mechanistic studies (kineticisotopeeffects, spectroelectrochemistry, optical spectroscopy, theoretical investigations) highlight the evidence of a fleeting CF3CO radical under photoredox conditions. The trifluoroacyl radical can be stabilized under CO atmosphere, delivering
我们报告了一种温和且操作简单的烯烃三氟酰化策略,该策略利用三氟乙酸酐作为低成本且易于获得的试剂。这种光介导的过程与传统方法有着根本的不同,它通过由光催化剂促进的三氟酰基自由基机制发生,从而触发 CO 键断裂。机理研究(动力学同位素效应、光谱电化学、光谱学、理论研究)突出了转瞬即逝的 CF 3的证据光氧化还原条件下的 CO 自由基。三氟酰基自由基可以在 CO 气氛下稳定,提供具有更高化学效率的三氟乙酰化产物。此外,该方法可以通过简单地改变反应参数变成三氟甲基化协议。除了简单的烯烃外,该方法还允许小分子药物和常见药效团的化学和区域选择性功能化。
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。
Synthesis of Tertiary Benzylic Nitriles via Nickel-Catalyzed Markovnikov Hydrocyanation of α-Substituted Styrenes
作者:Yidan Xing、Rongrong Yu、Xianjie Fang
DOI:10.1021/acs.orglett.9b04554
日期:2020.2.7
The Markovnikov hydrocyanation of α-substituted styrenes enables the synthesis of tertiary benzylic nitriles under nickel catalysis. The Lewis-acid-free transformation features an unprecedented functional groups tolerance, including the -OH and -NH2 groups. A broad range of tertiary benzylic nitriles were obtained in good to excellent yields. In addition, an asymmetric version of this reaction was
Herein, we report an unprecedented regiospecific oxidative Mizoroki-Heck type reaction for the synthesis of α-difluoromethyl homoallylic alcohols. The reaction shows broad substrate scopes and high functional group tolerance. Late-stage functionalization of complex biologically active molecules demonstrates the synthetic potential of this transformation. Mechanistic study supports the involvement of
[EN] SMARCA DEGRADERS AND USES THEREOF<br/>[FR] AGENTS DE DÉGRADATION DE SMARCA ET LEURS UTILISATIONS
申请人:KYMERA THERAPEUTICS INC
公开号:WO2020251971A1
公开(公告)日:2020-12-17
The present invention provides compounds, pharmaceutically acceptable compositions thereof, and methods of using the same for the modulation of one or more SWI/SNF-related matrix associated actin dependent regulator of chromatin subfamily A (SMARCA) and/or polybromo-1 (PB-1) protein via ubiqitination and/or degradation by compounds. The compounds are bifunctional molecules that link a cereblon-binding moiety to a ligand that binds SMARCA and/or PB1 proteins.