Supported Ionic Liquids. New Recyclable Materials for theL-Proline-Catalyzed Aldol Reaction
作者:Michelangelo Gruttadauria、Serena Riela、Carmela Aprile、Paolo Lo Meo、Francesca D'Anna、Renato Noto
DOI:10.1002/adsc.200505227
日期:2006.1
Newmaterials for L-proline recycling have been developed. These materials have been applied to the L-proline-catalyzed aldolreaction between acetone and several aldehydes. The L-proline has been supported on the surface of modified silica gels with a monolayer of covalently attached ionicliquid with or without additional adsorbed ionicliquid. Good yields and ee values, comparable with those obtained
Ruthenium-Catalyzed Oxidative Formal Aza-Diels-Alder Reaction: Enantioselective Synthesis of Benzo[<i>a</i>
]quinolizine-2-ones
作者:Yuan Yao、Hai-Jie Zhu、Fang Li、Cheng-Feng Zhu、Yun-Fei Luo、Xiang Wu、Eric Assen B. Kantchev
DOI:10.1002/adsc.201700738
日期:2017.9.18
11bS)‐benzo[a]quinolizine‐2‐one derivatives in good enantio‐ and diastereoselectivity by a one‐pot oxidative formal aza‐Diels–Alder reaction of 1,2,3,4‐tetrahydroisoquinolines and α,β‐unsaturated ketones is described. The reaction proceeds viatandem ruthenium‐catalyzed amine dehydrogenation using tert‐butyl hydroperoxide (TBHP) as the oxidant and a chiral thiourea‐catalyzed formal aza‐[4+2] cycloaddition, providing
一种通过一锅氧化1,2,3的形式正式氮杂-Diels-Alder反应制备具有良好对映异构和非对映选择性的热力学(4 R,11b S)-苯并[ a ]喹诺嗪-2-酮衍生物的方法描述了,4-四氢异喹啉和α,β-不饱和酮。该反应通过叔丁基氢过氧化物(TBHP)作为氧化剂和手性硫脲催化的正式氮杂[4 + 2]环加成反应,通过串联钌催化的胺脱氢而进行,为合成这些有价值的杂环化合物提供了分步经济的策略产品。
[EN] BORON-CONTAINING SMALL MOLECULES<br/>[FR] PETITES MOLECULES CONTENANT DU BORE
申请人:ANACOR PHARMACEUTICALS INC
公开号:WO2011060196A1
公开(公告)日:2011-05-19
This invention relates to 6-substituted benzoxaborole compounds of the following formula and their use for treating bacterial infections.
derivatives containing three stereocenters were prepared via one-step synthesis in yields ranging from 88 to 96% and in enantioselectivities (enantiomeric excess (ee)) ranging from 85 to 97%, with diastereoselectivities of approximately 14/2/1. Therefore, this method provides an efficientroute for the synthesis of a new class of opticallyactive 2-spirobenzothiophenones.
本报告描述了在金鸡纳生物碱胺存在下2-亚烷基苯并[ b ]噻吩酮衍生物与烯酮之间的有机催化级联反应。通过一步合成,制备了包含三个立体中心的螺苯并噻吩苯甲酸环己烷衍生物,其产率为88%至96%,对映选择性(对映体过量(ee))为85至97%,非对映选择性约为14/2/1。因此,该方法为合成新型的光学活性的2-螺苯并噻吩酮提供了有效的途径。
A Mild Procedure for Enone Preparation Catalysed by Bovine Serum Albumin in a Green and Easily Available Medium
作者:Sebastián M. Ardanaz、Ana J. Velez Rueda、Gustavo Parisi、Adolfo M. Iribarren、Luis E. Iglesias
DOI:10.1007/s10562-018-2386-4
日期:2018.6
A simple and mild procedure to obtain α,β-unsaturatedketones from acetone and a set of benzaldehydes is described. The approach applies bovine serum albumin (BSA) catalysis and water or ethanol, this mild reaction medium contrasting with the strong reaction conditions of the classic aldol condensation. Except for the assayed nitrobenzaldehydes, high enone yields (88–97%) were attained. In addition