involves alkoxylradicals generated from N‐alkoxypyridinium salts. A wide range of alkenes are smoothly difunctionalized in an anti‐Markovnikov fashion, affording various functionalized alkyl alkyl ethers. Notably, this mild process tolerates a number of functional groups and is efficiently carried out under both batch and flow conditions. Importantly, electron paramagnetic resonance (EPR) experiments
Visible light-promoted dihydroxylation of styrenes with water and dioxygen
作者:Bo Yang、Zhan Lu
DOI:10.1039/c7cc06745c
日期:——
The first efficient visible light promoted metal-free dihydroxylation of styrenes with water and dioxygen has been developed for the construction of vicinal alcohols. The protocol was operationally simple with broad substrate scope. The mechanistic studies demonstrated that one of the hydroxyl group came from water and the other one came from molecular oxygen. Additionally, the ß-alkyoxy alcohols could
Mechanistic Insight into Additions of Allylic Grignard Reagents to Carbonyl Compounds
作者:Nicole D. Bartolo、K. A. Woerpel
DOI:10.1021/acs.joc.8b01430
日期:2018.9.7
Allylic Grignard reagents exhibit high reactivity and low selectivity in additions to carbonyl compounds. Additions of allylic Grignard reagents to carbonyl compounds were investigated using prenylmagnesium chloride as a mechanistic probe. When the carbonyl group is relatively unhindered, the addition proceeds through a six-membered transition state with allylic transposition. This process generally