Visible-Light-Promoted Redox Neutral C–H Amidation of Heteroarenes with Hydroxylamine Derivatives
作者:Qixue Qin、Shouyun Yu
DOI:10.1021/ol501457s
日期:2014.7.3
redox neutral direct C–Hamidation of heteroarenes has been achieved. Hydroxylamine derivatives, which are easily accessed, have been employed as tunable nitrogen sources. These reactions were enabled by a visible-light-promoted single-electron transfer pathway without a directing group. A variety of heteroarenes, such as indoles, pyrroles, and furans, could go through this amidation with high yields (up
Visible-Light-Induced Direct Oxidative C−H Amidation of Heteroarenes with Sulfonamides
作者:Kun Tong、Xiaodong Liu、Yan Zhang、Shouyun Yu
DOI:10.1002/chem.201604014
日期:2016.10.24
A direct oxidative C−H amidation of heteroarenes with sulfonamides via nitrogen‐centered radicals has been achieved. Nitrogen‐centered radicals are directly generated from oxidative cleavage of N−H bonds under visible‐light photoredox catalysis. Sulfonamides, which are easily accessed, are used as tunable nitrogen sources and bleach (aqueous NaClO solution) is used as the oxidant. A variety of heteroarenes
substituted heteroarenes in nature and bioactive compounds. Some substitution patterns remain challenging: While highly efficient methods for the C2‐selective olefination of 3‐substituted five‐membered heteroarenes have been reported, analogous methods to access the 5‐olefinated products have remained limited by poor regioselectivities and/or the requirement to use an excess of the valuable heteroarene starting
Solvent-Controlled C2/C5-Regiodivergent Alkenylation of Pyrroles
作者:Youla Su、Shang Gao、Yue Huang、Aijun Lin、Hequan Yao
DOI:10.1002/chem.201502418
日期:2015.10.26
A solvent‐controlled C2/C5‐selective alkenylation of 3,4‐disubstituted pyrroles has been developed. The C3 substituent of pyrroles proved crucial to the regioselectivity. Substrates bearing directing groups at the C3 position exhibited excellent C2‐selectivities in chelation‐assisted CH activation in toluene or 1,4‐dioxane. However, a DMSO/DMF solvent system could override the chelation effect of
[EN] PYRROLE ANTIFUNGAL AGENTS<br/>[FR] AGENTS ANTIFONGIQUES À BASE DE PYRROLE
申请人:F2G LTD
公开号:WO2009130481A1
公开(公告)日:2009-10-29
The invention provides compounds of formula (I), and pharmaceutically and agriculturally acceptable salts thereof; wherein: R1, R2, R3, R4, R5, R6, A1, L1 and n are as defined herein. These compounds and their pharmaceutically acceptable salts are useful in prevention or treatment of a fungal disease. Compounds of formula (I), and agriculturally acceptable salts thereof, may also be used as agricultural fungicides.