Asymmetric radical reaction in the coordination sphere. 2. Asymmetric addition of alkane- and arenesulfonyl chlorides to olefins catalyzed by a ruthenium(II)-phosphine complex with chiral ligands
Asymmetric radical reaction in the coordination sphere. 2. Asymmetric addition of alkane- and arenesulfonyl chlorides to olefins catalyzed by a ruthenium(II)-phosphine complex with chiral ligands
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
β-hydroxysulfones from inexpensive and readily available terminal alkynes and sodium sulfinates via a consecutive one-pot reaction in an aqueous medium under mild conditions is described. The intermediates, β-ketosulfones, generated from an aerobicoxysulfonylation of terminal alkynes and sodium sulfinates catalyzed by an iron salt in MeOH/H2O (v : v = 3 : 1) at 50 °C, were subsequently reduced by a
描述了在温和条件下在水性介质中通过连续的一锅反应由廉价且容易获得的末端炔烃和亚磺酸钠高度对映选择性合成β-羟基砜的方法。随后在50°C下由铁盐在MeOH / H 2 O(v:v = 3:1)中催化的末端炔烃和亚磺酸钠的需氧氧磺酰化反应生成的中间体β-酮砜HCOONa作为氢源的催化不对称转移加氢反应。以高收率和高达99.9%ee值获得了各种手性β-羟基砜。这种一锅法工艺很容易按比例放大以进行克级合成。
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
Two for one: The combination of iron(III) chloride and stereoselective alcohol dehydrogenases allows the development of an efficient oxosulfonylation-bioreduction sequence to produce optically active β-hydroxy sulfones from arylacetylenes and sodium sulfinates in aqueous medium.