New Strategic Reactions for Organic Synthesis: Catalytic Asymmetric C−H Activation α to Oxygen as a Surrogate to the Aldol Reaction
作者:Huw M. L. Davies、Rohan E. J. Beckwith、Evan G. Antoulinakis、Qihui Jin
DOI:10.1021/jo034533c
日期:2003.8.1
The C-H activation of silyl ethers by means of rhodium carbenoid-induced C-H insertion represents a very direct method for the stereoselective synthesis of silyl-protected beta-hydroxy esters. The reaction can proceed with very high regio-, diastereo-, and enantioselectivity and represents a surrogate to the aldol reaction. The reaction is catalyzed by the rhodium prolinate complex Rh(2)(S-DOSP)(4)
Single-Step Dual Functionalization: One-Pot Bromination-Cross-Dehydrogenative Esterification of Hydroxy Benzaldehydes with CCl3Br – A Comparison with Selectfluor
作者:Ranadeep Talukdar
DOI:10.1055/s-0037-1610717
日期:2019.9
Bromination of phenolic compounds without directly using molecular bromine possesses much importance. In this article an IrIII/CCl3Br-assisted single-step double functionalization of hydroxy benzaldehydes is reported. It involves simultaneous esterification of the aldehyde group and bromination of the aryl ring of phenolic aldehydes in one-pot. The reaction proceeds under mild conditions in the presence
不直接使用分子溴对酚类化合物进行溴化具有重要意义。本文报道了 IrIII/CCl3Br 辅助的羟基苯甲醛单步双官能化。它涉及在一锅中同时进行醛基酯化和酚醛芳环的溴化。在 445 nm 蓝光 LED 光的存在下,反应在温和条件下进行,以中等至良好的产率获得高度官能化的溴羟基苯甲酸酯。相比之下,Selectfluor 作为氧化剂只产生非溴酚酸酯。
[EN] P300 INHIBITORS AND USE THEREOF IN MEDICINE<br/>[FR] INHIBITEURS DE P300 ET LEUR UTILISATION EN MÉDECINE<br/>[ZH] P300抑制剂及其在医药上的应用
申请人:BETTA PHARMACEUTICALS CO LTD
公开号:WO2022095989A1
公开(公告)日:2022-05-12
涉及一种化合物,其具有癌症治疗活性,还涉及这些化合物的制备方法以及包含其的药物组合物。
Process of producing a siloxy-functionalized polymer
申请人:Yan Yuan-Yong
公开号:US20060241241A1
公开(公告)日:2006-10-26
This invention relates to siloxy-functionalized polymers having the silicon of the siloxy group directly bonded to the end of a polymer chain through one or more carbon atoms, processes of producing the polymers, and initiators used to prepare the polymers. The polymers may be rubbery polymers, such as butadiene-styrene polymers, which are commonly used in tires.
Leveraging Regio- and Stereoselective C(sp<sup>3</sup>)–H Functionalization of Silyl Ethers to Train a Logistic Regression Classification Model for Predicting Site-Selectivity Bias
作者:Yannick T. Boni、Ryan C. Cammarota、Kuangbiao Liao、Matthew S. Sigman、Huw M. L. Davies
DOI:10.1021/jacs.2c04383
日期:2022.8.31
classification model using logistic regression to predict the major C–H functionalization site based on intrinsicsubstratereactivity and catalyst propensity for overriding it. This model enables prediction of the major product when applying these C–H functionalization methods to a new substrate of interest. Applying this model broadly, we have demonstrated its utility for guiding late-stage functionalization