Synthesis of 2,5-Diaryl-1,5-dienes from Allylic Bromides Using Visible-Light Photoredox Catalysis
摘要:
Visible-light photoreductive coupling of 2-arylallyl bromides in the presence of the photocatalyst Ru(bpy)(3)(PF6)(2), a Hantzsch ester, and i-Pr2NEt gives 2,5-diaryl-1,5-dienes in high yield. This method avoids the use of stoichiometric metal reductants and is compatible with the presence of halogen, alkyl, electron-donating, and electron-withdrawing substituents on the aromatic ring.
Synthesis of 1‐(3
<i>H</i>
)isobenzofuranone compounds by tin powder promoted cascade condensation reaction
作者:Shangxian Wang、Ke‐Hu Wang、Bo Chang、Danfeng Huang、Yulai Hu
DOI:10.1002/aoc.6249
日期:2021.7
An efficient approach for the construction of phthalide compounds is developed through tin powder mediated cascade condensation reaction of 2-formylbenzoic acids with allyl bromides or α-bromoketone under mild reaction conditions. This method is easy to operate and can tolerate various functional groups to give the corresponding phthalides in good to excellent yields. The phthalides produced from α-bromoketone
通过锡粉介导的 2-甲酰基苯甲酸与烯丙基溴或α-溴酮在温和反应条件下的级联缩合反应,开发了一种有效的邻苯二甲酸酯化合物构建方法。该方法操作简单,可以耐受各种官能团,从而以良好到极好的收率得到相应的邻苯二甲酸酯。由α-溴酮生产的邻苯二甲酸酯可进一步转化为3,3a -dihydro -8 H -pyrazolo [5, l - a ]isoindol-8-one和8 H -pyrazolo[5, l- a ]isoindol-8-一。
Visible-light-promoted radical alkylation/cyclization of allylic amide with N-hydroxyphthalimide ester: Synthesis of oxazolines
作者:Zhiyang Yan、Bin Sun、Panyi Huang、Haiyun Zhao、Hao Ding、Weike Su、Can Jin
DOI:10.1016/j.cclet.2021.09.067
日期:2022.4
An efficient photocatalytic alkylation/cyclization of allylic amide with N-hydroxyphthalimide ester has been developed. The transformation is taken advantage of alkyl radicals to attack allylic amide with the assist of inexpensive rose bengal as photocatalyst to prepare a series of alkyl substituted oxazolines in moderate to excellent yields. High regioselectivity, operational safety, mild conditions
Vesicular Monoamine Transporter Substrate/Inhibitor Activity of MPTP/MPP<sup>+</sup> Derivatives: A Structure–Activity Study
作者:D. Shyamali Wimalasena、Rohan P. Perera、Bruce J. Heyen、Inoka S. Balasooriya、Kandatege Wimalasena
DOI:10.1021/jm070875p
日期:2008.2.1
number of MPTP and MPP(+) derivatives that are suitable for the comparative neurotoxicity and complexIinhibition versus dopamine metabolism perturbation studies. Structure-activity studies with bovine chromaffin granule ghosts show that 3'-hydroxy-MPP(+) is one of the best known substrates for the vesicular monoamine transporter (VMAT). A series of compounds that combine the structural features of
The iridium-catalyzed asymmetric hydrogenation of 2-aryl allyl phthalimides to afford enantioenriched β-aryl-β-methyl amines is presented. Recently developed Ir-MaxPHOX catalysts are used for this enantioselective transformation. The mild reaction conditions and the feasible removal of the phthalimido group makes this catalytic method easily scalable and of great interest to afford chiral amines. The