Microwave-assisted oxidative coupling of amines to imines on solid acid catalysts
摘要:
A K-10 montmorillonite catalyzed microwave-assisted oxidative coupling of amines is described. Substituted benzylamines readily undergo self-coupling reactions to produce benzylidene-benzylamines, while aliphatic amines and anilines cannot form self-coupled products. A mixture of a benzylamine and an aniline or aliphatic amine, respectively, effectively, and selectively produces mixed imines, such as benzylidene-anilines and benzylidene-alkylamines. (C) 2007 Elsevier Ltd. All rights reserved.
Palladium-Catalyzed Asymmetric [3+2] Cycloaddition of Trimethylenemethane with Imines
作者:Barry M. Trost、Steven M. Silverman、James P. Stambuli
DOI:10.1021/ja0753389
日期:2007.10.1
The transition metal-catalyzed trimethylenemethane [3+2] cycloaddition provides a direct route to functionalized heterocycles. Herein, we describe a catalytic, asymmetric protocol for the reaction between 3-acetoxy-2-trimethylsilylmethyl-1-propene and various imines. The corresponding pyrrolidines were obtained in excellent yields and enantioselectivities making use of the novel phosphoramidite L10
A PRELIMINARY STUDY ON PREDICTING THE 13C CHEMICAL SHIFTS FOR A SERIES OF DISUBSTITUTED 2,3-DIPHENYL-1,3-THIAZOLIDIN-4-ONES
作者:John Tierney、Douglas Sheridan、Linda Mascavage、Daniela Gorbecheva、Michelle Ripp、Sonjoo Son
DOI:10.1515/hc.2005.11.3-4.215
日期:2005.1
the 2,3-diphenyl-l,3-thiazolidin4-one system affect the electron density surrounding the C-2, C-4 and C-5 atoms. These changes are reflected iη the different nmr chemical shifts for these carbonatoms relative to the unsubstituted compound. The C chemical shifts for the C-2, C-4 and C-5 carbons of these compounds have previously been shown to correlate with Hammett σ constants and Swain Lupton dual
已成功尝试预测一系列二取代的 2,3-二苯基-1,3thiazolidin-4-one 的 C 化学位移。先前的工作表明,放置在 2,3-二苯基-1,3-噻唑烷 4-one 系统的任一苯环上的取代基会影响 C-2、C-4 和 C-5 原子周围的电子密度。这些变化反映在这些碳原子相对于未取代化合物的不同核磁共振化学位移中。这些化合物的 C-2、C-4 和 C-5 碳的 C 化学位移先前已被证明与 Hammett σ 常数和 Swain Lupton 双取代基参数相关。由于这些相关性,我们决定基于两个单取代系列化合物的已知位移来研究预测噻唑烷酮环中 C-2、C4 和 C-5 的 C 化学位移的潜力。取代基对二取代 2,3-二苯基噻唑烷酮中 C-2、C-4 和 C-5 碳的 C 化学位移的影响相对于两个单取代的 2,3-二苯基噻唑烷酮系列进行了讨论。然后使用该数据预测噻唑烷酮环中 C-2、C-4
(Phenoxyimine)nickel-Catalyzed C(sp<sup>2</sup>)–C(sp<sup>3</sup>) Suzuki–Miyaura Cross-Coupling: Evidence for a Recovering Radical Chain Mechanism
作者:L. Reginald Mills、Eric M. Simmons、Heejun Lee、Eva Nester、Junho Kim、Steven R. Wisniewski、Matthew V. Pecoraro、Paul J. Chirik
DOI:10.1021/jacs.4c01474
日期:2024.4.10
the C(sp2)–C(sp3) Suzuki–Miyaura cross coupling of (hetero)arylboronic acids with alkyl bromides. With 5 mol % of the optimal (MeOMeFI)Ni(Aryl)(DMAP) precatalyst, the scope of the cross-coupling reaction was established and included a variety of (hetero)arylboronic acids and alkyl bromides (>50 examples, 33–97% yield). A β-hydride elimination–reductive elimination sequence from reaction with potassium
METHODS AND COMPOSITIONS OF TRAIL-DEATH RECEPTOR AGONISTS/ACTIVATORS
申请人:Srivastava Rakesh K.
公开号:US20080214547A1
公开(公告)日:2008-09-04
This invention describes a series of methods and compositions for prevention and treatment of diseases such as cancer. One aspect of the invention describes small molecule-based drugs that can be used to bind to death receptors TRAIL-R1/DR4 and/or TRAIL-R2/DR5 and induce apoptosis in cancer cells, while sparing normal cells. The invention also describes TRAIL Death Receptor Agonists/Activators (DRAs) and their uses, such as the induction of apoptosis through caspase-8 and caspase-3 activation. The present invention also describes the methods of treating cancers, such as breast, prostate, colon, pancreatic, ovarian, lung, and brain cancers, leukemia, lymphoma, multiple myeloma, and mesothelioma, using DRAs either as single-agent treatments, or in combination with other therapies.