Dynamic kinetic resolution of (S)-mandelate-derived α-bromo esters in nucleophilic substitution and asymmetric syntheses of 3-substituted morpholin-2-ones
作者:Yong Sun Park、Yoon Min Lee、Kyoung Hee Kang、Hye-Min Min、Hyun Jin Lim、Eun-Hyung Park
DOI:10.3998/ark.5550190.0011.201
日期:——
Dynamickineticresolution of (S)-mandelate-derivedα-bromoesters in nucleophilicsubstitution reaction has been investigated. Substitutions with various alkyl amine nucleophiles in the presence of TBAI and DIEA can provide various α-amino esters up to 81% yield and 97:3 dr. Also, the substitution of α-bromoesters with N-substituted 2-aminoethanol nucleophiles and following spontaneous cyclization
Discovery of phosphoinositide 3-kinases (PI3K) p110β isoform inhibitor 4-[2-hydroxyethyl(1-naphthylmethyl)amino]-6-[(2S)-2-methylmorpholin-4-yl]-1H-pyrimidin-2-one, an effective antithrombotic agent without associated bleeding and insulin resistance
作者:Fabrizio Giordanetto、Andreas Wållberg、Saswati Ghosal、Tommy Iliefski、Johan Cassel、Zhong-Qing Yuan、Henrik von Wachenfeldt、Søren M. Andersen、Tord Inghardt、Anders Tunek、Sven Nylander
DOI:10.1016/j.bmcl.2012.08.102
日期:2012.11
Structure-based evolution of the original fragment leads resulted in the identification of 4-[2-hydroxyethyl(1-naphthylmethyl)amino]-6-[(2S)-2-methylmorpholin-4-yl]-1H-pyrimidin-2-one, (S)-21, a potent, selective phosphoinositide 3-kinases (PI3K) p110 beta isoform inhibitor with favourable in vivo antiplatelet effect. Despite its antiplatelet action, (S)-21 did not significantly increase bleeding time in dogs. Additionally, due to its enhanced selectivity over p110 alpha, (S)-21 did not induce any insulin resistance in rats. (C) 2012 Elsevier Ltd. All rights reserved.
US2688638
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DE887507
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Petrov,K.D.; Tikhomirova,R.G., Journal of general chemistry of the USSR, 1964, vol. 34, p. 902 - 904