zinc bromides and regioconvergent Negishi coupling with aryl or alkenyl triflates. The use of a suitable phosphine ligand favoring Pd migration enabled the selective formation of the linear cross‐coupling product. Subsequently, mixtures of secondary alkyl bromides were prepared from linear alkanes by standard bromination, and regioconvergent cross‐coupling then provided access to the corresponding linear
Modifications of primaquine as antimalarials. 4. 5-Alkoxy derivatives of primaquine
作者:Eugene H. Chen、Keiichi Tanabe、Andrew J. Saggiomo、Edward A. Nodiff
DOI:10.1021/jm00390a012
日期:1987.7
blood schizonticides (Plasmodium berghei, mouse) and tissue schizonticides (Plasmodium cynomolgi, monkey). Several of these compounds were extremely active in both screens. Such a broad spectrum of antimalarial efficacy offers the possibility of a single drug that could cure the various relapsing and nonrelapsing malarias.
FLUORENE-TYPE COMPOUND, PHOTOPOLYMERIZATION INITIATOR COMPRISING SAID FLUORENE-TYPE COMPOUND, AND PHOTOSENSITIVE COMPOSITION CONTAINING SAID PHOTOPOLYMERIZATION INITIATOR
申请人:Daito Chemix Corporation
公开号:US20150259321A1
公开(公告)日:2015-09-17
According to an embodiment of the present invention, there is provided a novel fluorene-based compound and a photopolymerization initiator using the fluorene-based compound. The fluorene-based compound according to an embodiment of the present invention is represented by the general formula (1). A photopolymerization initiator having additionally high sensitivity can be provided by using the fluorene-based compound. In addition, a photopolymerization initiator that can impart additionally excellent characteristics can be provided by appropriately selecting, for example, a substituent.
Catalytic Bromination of Alkyl sp<sup>3</sup>C–H Bonds with KBr/Air under Visible Light
作者:Mengdi Zhao、Wenjun Lu
DOI:10.1021/acs.orglett.8b02208
日期:2018.9.7
Alkyl sp3C–H bonds of cycloalkanes and functional branch/linear alkanes have been successfully brominated with KBr using air or O2 as an oxidant at room temperature to 40 °C. The reactions are carried out in the presence of catalytic NaNO2 in 37% HCl (aq)/solvent under visible light, combining aerobic oxidations and photochemical radical processes. For various alkane substrates, CF3CH2OH, CHCl3, or CH2Cl2
Direct bromination of hydrocarbons catalyzed by Li2MnO3 under oxygen and photo-irradiation conditions
作者:Yuta Nishina、Junya Morita、Bunsho Ohtani
DOI:10.1039/c2ra22197g
日期:——
A method for the direct bromination of hydrocarbons with Br2 using a ubiquitous and inexpensive catalyst is highly desirable. Herein, we report the selective mono-bromination of hydrocarbons in good yield using Li2MnO3 as a catalyst under irradiation with a fluorescent room light. This new catalyst can be recycled. The effect of light was investigated using action spectra, which revealed that the reaction occurred on the surface of the catalyst.