Asymmetric synthesis of vicinal amino alcohols: xestoaminol C, sphinganine and sphingosine
作者:Elin Abraham、Stephen G. Davies、Nicholas L. Millican、Rebecca L. Nicholson、Paul M. Roberts、Andrew D. Smith
DOI:10.1039/b801357h
日期:——
beta-unsaturated esters, via conjugate addition of lithium (S)-N-benzyl-N-(alpha-methylbenzyl)amide and subsequent in situ enolate oxidation with (+)-(camphorsulfonyl)oxaziridine, has been used as the key step in the asymmetricsynthesis of N,O-diacetyl xestoaminol C (41% yield over 8 steps), N,O,O-triacetyl sphinganine (30% yield over 8 steps) and N,O,O-triacetyl sphingosine (30% yield over 7 steps)
[EN] ACETYLINIC PIPERAZINE COMPOUNDS AND THEIR USE AS METABOTROPIC GLUTAMATE RECEPTOR ANTAGONISTS<br/>[FR] COMPOSES ACETYLENIQUES DE PIPERAZINE ET LEUR UTILISATION EN TANT QU'ANTAGONISTES DU RECEPTEUR METABOTROPE DU GLUTAMATE
申请人:ASTRAZENECA AB
公开号:WO2005080363A1
公开(公告)日:2005-09-01
The present invention relates to new acetylinic piperazine compounds of formula I, their pharmaceutically acceptable salts, and hydrates: Formula (I), wherein R1, R2, R3, R4, M, and n are as defined in the description. The invention also relates to processes for the preparation of the compounds and to new intermediates employed in the preparation, pharmaceutical compositions containing the compounds, and to the use of the compounds in therapy.
作者:Nils C. Eichenauer、Anja C. M. Nordschild、Martina Bischop、Dominik Schumacher、Marcel K. W. Mackwitz、Roxanne Tschersich、Thorsten Wilhelm、Jörg Pietruszka
DOI:10.1002/ejoc.201500700
日期:2015.9
The totalsynthesis of solandelactones A and B is presented. The eastern cyclopropyl moiety was prepared following an exceptionally short chemoenzymatic approach whereas enantioselective synthesis of the western side-chain relied on the application of diastereomerically pure allyl boronates. The natural products solandelactones A and B were isolated in good overall yields following convergence of each
介绍了茄内酯 A 和 B 的全合成。东部环丙基部分是按照非常短的化学酶促方法制备的,而西部侧链的对映选择性合成依赖于非对映异构纯硼酸烯丙酯的应用。通过应用 Nozaki-Hiyama-Kishi 反应将每个东西元素收敛后,天然产物茄内酯 A 和 B 以良好的总产率分离。
Asymmetric Vinylogous Mukaiyama Aldol Reaction of Aldehyde-Derived Dienolates
作者:Marc T. Gieseler、Markus Kalesse
DOI:10.1021/ol2006727
日期:2011.5.6
functionality, the conjugate addition of hydrides followed by internal protonation allows access to alpha chiral aldehydes. Even though vinylogousMukaiyamaaldolreactions have been used in natural product syntheses before, the first enantioselective Mukaiyamaaldolreaction of aldehyde-derived dienolates is described.
Diverse Site-Selective Transformation of Benzylic and Allylic Silyl Ethers via Organocatalytic Oxidation
作者:Shohei Hamada、Kaori Sakamoto、Eri Miyazaki、Elghareeb E. Elboray、Yusuke Kobayashi、Takumi Furuta
DOI:10.1021/acscatal.3c01153
日期:2023.6.16
the electronic properties of silylethers, thus enabling selective oxidation of benzylic and allylic silylethers, despite steric factors. A subsequent one-pot reduction accomplishes the formal deprotection to the corresponding benzylic and allylic alcohols. This catalytic system allows the direct oxidative desymmetrization of bis-benzylic and bis-allylic silylethers to access synthetically useful