Metal-catalyzed coupling process comprising reacting a compound of general formula 1 with a compound A-X, to obtain a compound of general formula 2, which may further be converted to a compound of general formula 3
Direct C−H Arylation of Electron-Deficient Heterocycles with Arylboronic Acids
作者:Ian B. Seiple、Shun Su、Rodrigo A. Rodriguez、Ryan Gianatassio、Yuta Fujiwara、Adam L. Sobel、Phil S. Baran
DOI:10.1021/ja1066459
日期:2010.9.29
A directarylation of a variety of electron-deficientheterocycles with arylboronic acids has been developed. This new reaction proceeds readily at room temperature using inexpensive reagents: catalytic silver(I) nitrate in the presence of persulfate co-oxidant. The scope with respect to heterocycle and boronic acid coupling partner is broad, and sensitive functional groups are tolerated. This method
B(C<sub>6</sub>
F<sub>5</sub>
)<sub>3</sub>
-Catalyzed Cascade Reduction of Pyridines
作者:Zhi-Yun Liu、Zhi-Hui Wen、Xiao-Chen Wang
DOI:10.1002/anie.201702304
日期:2017.5.15
development hinges upon the realization of a cascade process of dearomative hydrosilylation (or hydroboration) and transfer hydrogenation. The broad functional‐group tolerance (e.g. ketone, ester, unactivated olefins, nitro, nitrile, heterocycles, etc.) implies high practical utility.
已发现B(C 6 F 5)3是一种有效的催化剂,可以用氢化硅烷(或氢硼烷)和胺作为还原剂还原吡啶和其他电子不足的N-杂芳烃。该开发的成功取决于脱芳香氢化硅烷化(或硼氢化)和转移氢化的级联过程的实现。宽泛的官能团耐受性(例如酮,酯,未活化的烯烃,硝基,腈,杂环等)暗示着很高的实用性。
6-O-acyl ketolide antibacterials
申请人:——
公开号:US20030220272A1
公开(公告)日:2003-11-27
6-O-Acyl ketolide antibacterials of the formula:
1
wherein R
1
, R
2
, R
3
, R
4
, W, X, X′, Y, and Y′ are as described herein and in which the substituents have the meaning indicated in the description. These compounds are useful as antibacterial agents.
6-O-Carbamoyl ketolide antibacterials of the formula:
1
wherein R
1
, R
2
, R
3
, R
4
, R
5
, R
6
, X, X′, Y, and Y′ are as described herein and in which the substituents have the meaning indicated in the description. These compounds are useful as antibacterial agents.