描述了在催化量的手性全氢-1,3-苯并恶嗪存在下,在温和的反应条件下使用末端炔烃和 Me 2 Zn对靛红和靛红衍生的酮亚胺进行对映选择性炔基化的通用方案,具有中等至优异的对映选择性。酮亚胺的添加提供了一种将手性胺作为羟吲哚衍生物的新方法。对于芳基和烷基取代的末端炔烃和靛红衍生物,该反应的范围很广。在靛红中,炔基化发生在羰基的Si面,而在酮亚胺衍生物中,它发生在亚胺的Re面。
Expedited microwave-assisted N-alkylation of isatins utilizing DBU
作者:Carly A. Jordan、Krystyna B. Wieczerzak、Kyle J. Knisley、Daniel M. Ketcha.
DOI:10.3998/ark.5550190.p008.205
日期:——
The N-alkylation of a variety of isatins with alkyl or benzylic halides can be effected under microwave irradiation in ethanol using 1,8-diazabicyclo[5.4.0]undec-7-ene (DBU) as a base. The conditions employed allow for the expedited synthesis of such substrates wherein the products precipitate from the reaction mixture in high yields and high purity after simple filtration. As will be described, microwave
作者:Charles M. Clay、Hagar M. Abdallah、Carly Jordan、Kyle Knisley、Daniel M. Ketcha
DOI:10.3998/ark.5550190.0013.629
日期:——
The N-alkylation of isatins by a variety of alkyl halides and one acrylate has been demonstrated utilizing KF/Al 2O3 in acetonitrile (ACN) under microwave-irradiation (180 o C) or thermally at reflux.
在微波辐射 (180 o C) 或加热回流下,使用 KF/Al 2O3 在乙腈 (ACN) 中使用各种烷基卤化物和一种丙烯酸酯对靛红进行 N-烷基化已被证明。
Enantioselective synthesis of 3-hydroxy- and 3-amino-3-alkynyl-2-oxindoles by the dimethylzinc-mediated addition of terminal alkynes to isatins and isatin-derived ketimines
作者:Elena Prieto、Jorge D. Martín、Javier Nieto、Celia Andrés
DOI:10.1039/d3ob01023f
日期:——
protocol for enantioselective alkynylation of isatins and isatin-derived ketimines using terminal alkynes and Me2Zn in the presence of a catalytic amount of a chiral perhydro-1,3-benzoxazine with moderate to excellent enantioselectivity under mild reaction conditions is described. The additions to ketimines present a novel approach to chiral amines being derivatives of oxindoles. The reaction is broad
描述了在催化量的手性全氢-1,3-苯并恶嗪存在下,在温和的反应条件下使用末端炔烃和 Me 2 Zn对靛红和靛红衍生的酮亚胺进行对映选择性炔基化的通用方案,具有中等至优异的对映选择性。酮亚胺的添加提供了一种将手性胺作为羟吲哚衍生物的新方法。对于芳基和烷基取代的末端炔烃和靛红衍生物,该反应的范围很广。在靛红中,炔基化发生在羰基的Si面,而在酮亚胺衍生物中,它发生在亚胺的Re面。