Photocatalyzed Csp<sup>3</sup>–Csp<sup>3</sup> cross-dehydrogenative coupling of <i>N</i>-Boc-tetrahydroisoquinolines with α,β-unsaturated ketones
作者:Na-Ri-Mei Ao、Xue-Qing Zhu、Chun-Xin Zhao、Ya-Ru Gao、Yong-Qiang Wang
DOI:10.1039/d1ob00527h
日期:——
A novel photocatalyzed cross-dehydrogenative coupling reaction of N-Boc-tetrahydroisoquinolines with α,β-unsaturatedketones has been developed. This research provides an easy access to a variety of C1-substituted tetrahydroisoquinolines, which can be further transformed into benzo[a]-quinolizine-2-ones, the skeletons of natural products with a wide range of biological activities. The load of the photocatalyst
开发了一种新型光催化N -Boc-四氢异喹啉与 α,β-不饱和酮的交叉脱氢偶联反应。这项研究提供了一种容易获得各种 C1 取代的四氢异喹啉的方法,这些四氢异喹啉可以进一步转化为具有广泛生物活性的天然产物骨架苯并[ a ]-quinolizine-2-ones。光催化剂的负载量低,氧化剂便宜且毒性较小。
2-Amino-quinazolin-5-ones
申请人:Bellamacina R. Cornelia
公开号:US20070027150A1
公开(公告)日:2007-02-01
2-Amino-quinazolin-5-one compounds, stereoisomers, tautomers, pharmaceutically acceptable salts, and prodrugs thereof; compositions that include a pharmaceutically acceptable carrier and one or more of the 2-amino-quinazolin-5-one compounds, either alone or in combination with at least one additional therapeutic agent. Methods of using the 2-amino-quinazolin-5-one compounds, either alone or in combination with at least one additional therapeutic agent, in the prophylaxis or treatment of cell proliferative diseases.
PPh<sub>3</sub>⋅HBr-DMSO Mediated Expedient Synthesis of γ-Substituted β,γ-Unsaturated α-Ketomethylthioesters and α-Bromo Enals: Application to the Synthesis of 2-Methylsulfanyl-3(<i>2 H</i>)-furanones
作者:Kanchan Mal、Abhinandan Sharma、Prakas R. Maulik、Indrajit Das
DOI:10.1002/chem.201303755
日期:2014.1.13
An efficient chemoselective general procedure for the synthesis of γ‐substituted β,γ‐unsaturatedα‐ketomethylthioesters from α,β‐unsaturatedketones has been achieved through an unprecedented PPh3⋅HBr‐DMSO mediated oxidative bromination and Kornblum oxidation sequence. The newly developed reagent system serves admirably for the synthesis of α‐bromoenals from enals. Furthermore, AuCl3‐catalyzed efficient
An efficient and metal-free synthesis of biaryls and heterobiaryls has been developed via a key three-component reaction of benzylideneacetones, isopropenyl acetate and methyl propiolate under high pressure (9 Kbar) and mild reaction temperature (40 °C) conditions. The described synthetic protocol provide rapid access to novel, highly functionalized and metal-uncontamined 1,1'-biaryls and heterobiaryls
Chromatography-Free Wittig Reactions Using a Bifunctional Polymeric Reagent
作者:Peter Shu-Wai Leung、Yan Teng、Patrick H. Toy
DOI:10.1021/ol1021614
日期:2010.11.5
The first example of a polystyrene bearing two distinct reagent groups has been prepared. This phosphine and amine functionalized material was used in one-pot Wittig reactions with an aldehyde and either an α-halo-ester, -ketone, or -amide. Due to the heterogeneous nature of the polymer, the desired alkene product of these reactions could be isolated in excellent yield in essentially pure form after