Enantioselective hydrogenation of β-keto sulfones with chiral Ru(II)-catalysts: synthesis of enantiomerically pure butenolides and γ-butyrolactones
摘要:
A series of beta-hydroxy sulfones were synthesized with high enantioselectivities via a new enantioselective ruthenium-catalyzed hydrogenation using MeO-BIPHEP as a ligand. Some beta-hydroxy sulfones were used in the synthesis of optically active butenolides and gamma-butyrolactones with high yields and enantioselectivities over 95%. (C) 1999 Elsevier Science Ltd. All rights reserved.
Enantioselective hydrogenation of β-keto sulfones with chiral Ru(II)-catalysts: synthesis of enantiomerically pure butenolides and γ-butyrolactones
摘要:
A series of beta-hydroxy sulfones were synthesized with high enantioselectivities via a new enantioselective ruthenium-catalyzed hydrogenation using MeO-BIPHEP as a ligand. Some beta-hydroxy sulfones were used in the synthesis of optically active butenolides and gamma-butyrolactones with high yields and enantioselectivities over 95%. (C) 1999 Elsevier Science Ltd. All rights reserved.
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
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
Enantioselective hydrogenation of β-keto sulfones with chiral Ru(II)-catalysts: synthesis of enantiomerically pure butenolides and γ-butyrolactones
A series of beta-hydroxy sulfones were synthesized with high enantioselectivities via a new enantioselective ruthenium-catalyzed hydrogenation using MeO-BIPHEP as a ligand. Some beta-hydroxy sulfones were used in the synthesis of optically active butenolides and gamma-butyrolactones with high yields and enantioselectivities over 95%. (C) 1999 Elsevier Science Ltd. All rights reserved.