Trifluoromethyl Thianthrenium Triflate: A Readily Available Trifluoromethylating Reagent with Formal CF<sub>3</sub><sup>+</sup>, CF<sub>3</sub><sup>•</sup>, and CF<sub>3</sub><sup>–</sup> Reactivity
作者:Hao Jia、Andreas P. Häring、Florian Berger、Li Zhang、Tobias Ritter
DOI:10.1021/jacs.1c02606
日期:2021.5.26
thianthrenium triflate (TT-CF3+OTf–) as a novel trifluoromethylating reagent, which is conveniently accessible in a single step from thianthrene and triflicanhydride. We demonstrate the use of TT-CF3+OTf– in electrophilic, radical, and nucleophilic trifluoromethylation reactions.
Stereodivergent Organocatalytic Intramolecular Michael Addition/Lactonization for the Asymmetric Synthesis of Substituted Dihydrobenzofurans and Tetrahydrofurans
作者:Dorine Belmessieri、Alix de la Houpliere、Ewen D. D. Calder、James E. Taylor、Andrew D. Smith
DOI:10.1002/chem.201402684
日期:2014.7.28
A stereodivergent asymmetric Lewis base catalyzed Michaeladdition/lactonization of enone acids into substituted dihydrobenzofuran and tetrahydrofuran derivatives is reported. Commercially available (S)‐(−)‐tetramisole hydrochloride gives products with high syn diastereoselectivity in excellent enantioselectivity (up to 99:1 d.r.syn/anti, 99 % eesyn), whereas using a cinchona alkaloid derived catalyst
报道了立体发散的不对称路易斯碱催化烯酮酸的迈克尔加成/内酯化成取代的二氢苯并呋喃和四氢呋喃衍生物。市售的 ( S )-(-)-四咪唑盐酸盐可提供具有高顺非对映选择性和出色对映选择性的产品(高达 99:1 dr syn / anti,99 % ee syn),而使用金鸡纳生物碱衍生的催化剂可得到相应的反-主要产品为非对映异构体(高达 10:90 dr syn / anti , 99 % ee anti)。
[EN] A TRIFLUOROMETHYL THIANTHRENIUM COMPOUND, PROCESS FOR PREPARING THE SAME AND THE USE THEREOF<br/>[FR] COMPOSÉ DE TRIFLUOROMÉTHYL THIANTHRÉNIUM, SON PROCÉDÉ DE PRÉPARATION ET SON UTILISATION
申请人:STUDIENGESELLSCHAFT KOHLE MBH
公开号:WO2022219003A1
公开(公告)日:2022-10-20
The present inventions refers a novel trifluoromethyl thianthrenium compound referred to as TT-CF3+X–, a process for preparing the same and the use thereof for trifluoromethylating organic compounds.
Telescoped Synthesis of Stereodefined Pyrrolidines
作者:Dorine Belmessieri、David B. Cordes、Alexandra M. Z. Slawin、Andrew D. Smith
DOI:10.1021/ol401554y
日期:2013.7.5
Telescoped and one-pot olefination/asymmetric functionalization approaches to disubstituted pyrrolidines (dr up to 99:1, up to 99% ee) have been developed using commercially available tetramisole (0.1 to 5 mol %). Using OTMS-quinidine as the Lewis base gives preferential access to an anti-configured pyrrolidine in high enantioselectivity.