<i>Z</i>
‐Selective Fluoroalkenylation of (Hetero)Aromatic Systems by Iodonium Reagents in Palladium‐Catalyzed Directed C−H Activation
作者:Balázs L. Tóth、Gergő Sályi、Attila Domján、Orsolya Egyed、Attila Bényei、Zsombor Gonda、Zoltán Novák
DOI:10.1002/adsc.202101108
日期:2022.1.18
The direct and catalytic incorporation of fluorine containing molecular motifs into organic compounds resulting high-value added chemicals represents a rapidly evolving part of synthetic methodologies, thus this area is in the focus of pharmaceutical and agrochemical research. Herein we report a stereoselective procedure for direct fluorovinylation of aromatic and heteroaromatic scaffolds. This methodology
Room-Temperature Palladium-Catalyzed CH Activation:<i>ortho</i>-Carbonylation of Aniline Derivatives
作者:Chris E. Houlden、Marc Hutchby、Chris D. Bailey、J. Gair Ford、Simon N. G. Tyler、Michel R. Gagné、Guy C. Lloyd-Jones、Kevin I. Booker-Milburn
DOI:10.1002/anie.200805842
日期:2009.2.23
Pd and CO—ureally got me! The title reaction proceeds efficiently at 18 °C under CO (1 atm) with 5 % [Pd(OTs)2(MeCN)2] as precatalyst. Depending on the solvents used, either anthranilates or cyclic imides can be obtained in high yields (see picture, BQ=benzoquinone, Ts=4‐toluenesulfonyl).
Pd 和 CO - 真的抓住了我!标题反应在 18 °C 下在 CO (1 atm) 下有效进行,使用 5% [Pd(OTs) 2 (MeCN) 2 ] 作为预催化剂。根据所使用的溶剂,可以高产率获得邻氨基苯甲酸酯或环状酰亚胺(见图,BQ=苯醌,Ts=4-甲苯磺酰基)。
Substituted benzene derivatives useful as neuraminidase inhibitors
申请人:BioCryst Pharmaceuticals, Inc.
公开号:US05602277A1
公开(公告)日:1997-02-11
A compound of the Formula (I): ##STR1## or pharmaceutically-suitable salts or prodrug forms thereof, wherein: n is 0-1; m is 0; p is 0-1; R.sup.1 is --CO.sub.2 H; R.sup.2 is selected from the group consisting of H, --OH, and --NH.sub.2 ; R.sup.3 is H; R.sup.4 is --C(O)NHR.sup.8 ; R.sup.5 is --NHC(R.sup.6)NH.sub.2 R.sup.6 is selected from the group consisting of .dbd.NH, .dbd.NOH, .dbd.NCN, .dbd.O, and .dbd.S; and R.sup.8 is selected from the group consisting of C.sub.1 -C.sub.4 linear or branched alkyl substituted with 0-3 halogens on each carbon.
Rhodium(<scp>iii</scp>)-catalysed aerobic synthesis of highly functionalized indoles from N-arylurea under mild conditions through C–H activation
作者:Subban Kathiravan、Ian A. Nicholls
DOI:10.1039/c4cc06020b
日期:——
arylation of alkynes using copper as the terminal oxidant for regeneration of the catalytically active species under aerobic conditions is described. This novel C-H activation reaction was applied to the synthesis of a wide range of substituted indolesfrom N-arylureas.
One-pot synthesis of 2,3-difunctionalized indoles via Rh(<scp>iii</scp>)-catalyzed carbenoid insertion C–H activation/cyclization
作者:Honggui Lv、Jingjing Shi、Bo Wu、Yujuan Guo、Junjun Huang、Wei Yi
DOI:10.1039/c7ob01977g
日期:——
Reported herein is the first Rh(III)-catalyzedcarbenoidinsertionC–H activation/cyclization of N-arylureas and α-diazo β-keto esters. The redox-neutral reaction has the following features: good to excellent yields, broad substrate/functional group tolerance, exclusive regioselectivity, and no need for additional oxidants or additives, which render this methodology as a more efficient and versatile