A Photoredox Coupling Reaction of Benzylboronic Esters and Carbonyl Compounds in Batch and Flow
作者:Yiding Chen、Oliver May、David C. Blakemore、Steven V. Ley
DOI:10.1021/acs.orglett.9b02307
日期:2019.8.2
Mild cross-coupling reaction between benzylboronic esters with carbonylcompounds and some imines was achieved under visible-light-induced iridium-catalyzed photoredox conditions. Functional group tolerance was demonstrated by 51 examples, including 13 heterocyclic compounds. Gram-scale reaction was realized through the use of computer-controlled continuous flow photoreactors.
Pictet–Spengler type reaction of vinylogousesters in good yields. The methodology is applied for the formal synthesis of key intermediate alcohols for the synthesis of D4 antagonist sonepiprazole (±)-U-101387 and the isochroman (±)-U-54537. Trimethylsilyl triflate (TMSOTf) can be efficiently used for the synthesis of isochromans via Pictet–Spengler type reaction of vinylogousesters in good yields. The methodology
β‐Arylation of Racemic Secondary Benzylic Alcohols to Access Enantioenriched β‐Arylated Alcohols
作者:Wang Miao、Jinyu Zhang、Yanyan Yang、Weijun Tang、Dong Xue、Jianliang Xiao、Huaming Sun、Chao Wang
DOI:10.1002/anie.202306015
日期:2023.7.24
catalyst, the first example of β-arylation of secondary alcohols with aryl bromides has been developed via borrowing hydrogen catalysis enabled by an MPV type hydrogen transfer process. In addition, the enantioconvergent version of the reaction has also been realized under the catalysis of Pd and Ru, allowing for the transformation of racemic secondary alcohols into enantioenriched chiral alcohols with good
Investigations concerning the COX/5-LOX inhibiting and hydroxyl radical scavenging potencies of novel 4,5-diaryl isoselenazoles
作者:Michael Scholz、Holger K. Ulbrich、Gerd Dannhardt
DOI:10.1016/j.ejmech.2007.09.007
日期:2008.6
this study was to investigate 4,5-diaryl isoselenazoles as multiple target non-steroidal anti-inflammatory drugs (MTNSAIDs) which can intervene into the inflammatory processes via different mechanisms of action creating a new class of compounds. Here we describe the synthesis of COX/LOX inhibitors which additionally reduce the level of reactive oxygen species, such as hydroxylradicals which are well