stable allenyl, propargyl, or allyl-propargyl hybrid cations have been developed. These carbocations could be generated from silyl 1-(pi-donor)-substituted propargylethers by the action of trimethylsilyl trifluoromethanesulfonate in dichloromethane at -78 degrees C to room temperature and could be attacked nucleophilically by electron rich arenes, allylsilanes, or enol silyl ethers, giving rise to
Potassium <i>tert</i>-Butoxide-Mediated Condensation Cascade Reaction: Transition Metal-Free Synthesis of Multisubstituted Aryl Indoles and Benzofurans
作者:Pengfei Yang、Weiyan Xu、Rongchao Wang、Min Zhang、Chunsong Xie、Xiaofei Zeng、Min Wang
DOI:10.1021/acs.orglett.9b01093
日期:2019.5.17
tert-butoxide-mediated condensation reactioninvolving a vinyl sulfoxide intermediate. Products are obtained from N- or O-benzyl benzaldehydes using dimethyl sulfoxide as a carbon source. The methodology features a wide functional group tolerance and transition metal-free environment. Preliminary mechanistic studies suggest that the reactioninvolves a tandem aldol reaction/Michaeladdition/dehydrosulfenylation/isomerization
Copper‐Catalyzed Asymmetric Diyne Cyclization via [1,2]‐Stevens‐Type Rearrangement for the Synthesis of Chiral Chromeno[3,4‐
<i>c</i>
]pyrroles
作者:Feng‐Lin Hong、Chong‐Yang Shi、Pan Hong、Tong‐Yi Zhai、Xin‐Qi Zhu、Xin Lu、Long‐Wu Ye
DOI:10.1002/anie.202115554
日期:2022.2.7
copper-catalyzed asymmetric cascade cyclization/[1,2]-Stevens-type rearrangement is disclosed, affording valuable chiral chromeno[3,4-c]pyrroles bearing a quaternary carbon stereocenter in generally moderate to good yields with excellent enantioselectivities. Importantly, this protocol represents the first catalytic asymmetric [1,2]-Stevens-type rearrangement based on alkynes and the first asymmetric formal carbene
公开了一种铜催化的不对称级联环化/[1,2]-Stevens 型重排,以通常中等至良好的产率和优异的对映选择性提供有价值的手性色烯并[3,4- c ]吡咯,其具有季碳立体中心。重要的是,该协议代表了第一个基于炔烃的催化不对称 [1,2]-史蒂文斯型重排和第一个不对称的形式卡宾插入 Si-O 键。
[EN] DIBENZYLAMINES AS AMINO ACID TRANSPORT INHIBITORS<br/>[FR] DIBENZYLAMINES UTILISABLES COMME INHIBITEURS DU TRANSPORT DES ACIDES AMINÉS
申请人:UNIV VANDERBILT
公开号:WO2020252336A1
公开(公告)日:2020-12-17
These compounds are amino acid transporter inhibitors. Amino acid transporter inhibitors are useful to treat a variety of diseases disorders, or conditions including cancer.
这些化合物是氨基酸转运体抑制剂。氨基酸转运体抑制剂可用于治疗多种疾病、失调或病况,包括癌症。
Iron-catalyzed azidation of cyclobutanol by C C bond cleavage
作者:Xiaoyuan Liu、Limei Wang、Jincheng Zhan、Shutao Sun、Lei Liu、Wei Li、Qian Wan
DOI:10.1016/j.tetlet.2024.155016
日期:2024.4
cyclobutanols through CC bond cleavage is disclosed for the first time. A range of tertiary cyclobutanols are tolerated providing γ-carbonyl-containing secondary alkyl azides. The method provides a straightforward approach for introducing azide group into aliphatic chain of organic molecules. A plausible mechanism involving radical-mediated sequential CC bond cleavage and C−N bond formation is proposed
首次公开了铁催化环丁醇通过CC键断裂的开环叠氮化反应。可以耐受一系列叔环丁醇,提供含γ-羰基的仲烷基叠氮化物。该方法提供了一种将叠氮基引入有机分子的脂肪链中的简单方法。提出了一种涉及自由基介导的连续 CC 键断裂和 CN 键形成的合理机制。