Highly Enantioselective One-Pot Synthesis of Chiral β-Hydroxy Sulfones via Asymmetric Transfer Hydrogenation in an Aqueous Medium
作者:Dacheng Zhang、Tanyu Cheng、Qiankun Zhao、Jianyou Xu、Guohua Liu
DOI:10.1021/ol502832a
日期:2014.11.7
A mild transformation in an aqueousmedium for the one-pot synthesis of optically active β-hydroxy sulfones is described. The intermediates of β-keto sulfones obtained via a nucleophilic substitution reaction of α-bromoketones and sodium sulfinates in H2O/MeOH (1:3, v/v) at 50 °C were reduced through Ru-catalyzed asymmetric transfer hydrogenation in one-pot using HCOONa as a hydrogen source providing
描述了在水性介质中的温和转化,用于一锅合成旋光性β-羟基砜。在50°C下通过Ru催化的不对称转移加氢还原反应,通过α-溴代酮和亚磺酸钠在H 2 O / MeOH(1:3,v / v)中的亲核取代反应获得的β-酮砜中间体使用HCOONa作为氢源的高电位锅,可提供高收率和出色的对映选择性的各种手性β-羟基砜。
One-pot synthesis of optically pure β-hydroxy sulfones via a heterogeneous ruthenium/diamine-promoted nucleophilic substitution-asymmetric transfer hydrogenation tandem process
作者:Jinyu Wang、Liang Wu、Xiaoying Hu、Rui Liu、Ronghua Jin、Guohua Liu
DOI:10.1039/c7cy01262d
日期:——
silica-based ruthenium/diamine-functionalized heterogeneous catalyst is prepared through the co-condensation of chiral 4-((trimethoxysilyl)ethyl)phenylsulfonyl-1,2-diphenylethylene-diamine and tetraethoxysilane, followed by complexation with a ruthenium/diamine complex. Its solid-state carbon cross-polarization/magic angle spinning NMR spectrum demonstrates well-defined single-site ruthenium/diamine species
Efficient synthesis of chiral β-hydroxy sulfones <i>via</i> iridium-catalyzed hydrogenation
作者:Lin Tao、Congcong Yin、Xiu-Qin Dong、Xumu Zhang
DOI:10.1039/c8ob02923g
日期:——
A highly efficient Ir/f-Amphol-catalyzed asymmetric hydrogenation of prochiral β-keto sulfones was successfully developed to prepare a series of chiral β-hydroxy sulfones with good to excellent results (62%–>99% conversions, 35%–99% yields and 86%–>99% ee). Our Ir/f-Amphol L4 catalytic system exhibited very high activity; the gram-scale asymmetric hydrogenation was performed well with just 0.005 mol%
A Compartmentalized‐type Bifunctional Magnetic Catalyst for One‐pot Aerobic Oxysulfonylation and Asymmetric Transfer Hydrogenation
作者:Shitong Wang、Chengyi Wang、Ning Lv、Chunxia Tan、Tanyu Cheng、Guohua Liu
DOI:10.1002/cctc.202001553
日期:2021.2.5
Utilization of the confined cavity of the mesoporoussilica, the exploration of the synergetic catalysis process for sequential organic transformations has great significance in asymmetric catalysis. In this study, the yolk‐shell‐structured magnetic nanoparticles with the chiral Ru/diamine species within the nanochannels of the outer mesoporoussilica shell and the FeCl3 species on the inner magnet
Asymmetric Hydrogenation of β-Keto Sulfonamides and β-Keto Sulfones with a Chiral Cationic Ruthenium Diamine Catalyst
作者:Xiao-Fei Huang、Shao-Yun Zhang、Zhi-Cong Geng、Chun-Yuen Kwok、Peng Liu、Hai-Yan Li、Xing-Wang Wang
DOI:10.1002/adsc.201300331
日期:2013.10.11
AbstractOptically active β‐hydroxy sulfonamides and β‐hydroxy sulfones are very important building blocks for the preparation of bioactive compounds and pharmaceuticals. In this work, a highly efficient asymmetric hydrogenation of β‐keto sulfonamides and β‐keto sulfones has been developed using the phosphine‐free chiral ruthenium complex Ru(OTf)(TsDPEN)(η6‐p‐cymene) as the catalyst, to afford the corresponding β‐hydroxy sulfonamides and β‐hydroxy sulfones in high yields with excellent optical purities. In addition, a cascade asymmetric hydrogenation/dynamic kinetic resolution (DKR) of racemic cyclic β‐keto sulfonamides and β‐keto sulfones was also realized using the same catalyst, to give the corresponding chiral cyclic β‐hydroxy sulfonamides and β‐hydroxy sulfones in good yields with excellent enantio‐ and diastereoselectivities.magnified image