开发了一种 Ce 催化的策略,通过在室温下光氧化裂解 C-C 双键来生产联芳基甲酮。该反应在空气下进行,表现出高活性和官能团耐受性。基于实验观察,还提出了协同的 Ce/ROH 催化机制。该协议应该是第一个成功的 Ce 催化烯烃以空气为氧化剂的光氧化反应,这将为开发新型 Ce 催化光化学合成工艺提供灵感。
Direct synthesis of 1,1-diarylalkenes from alkenyl phosphates via nickel(0)-catalysed Suzuki–Miyaura coupling
作者:Anders L. Hansen、Jean-Philippe Ebran、Thomas M. Gøgsig、Troels Skrydstrup
DOI:10.1039/b609064h
日期:——
A combination of Ni(COD)(2) and PCy(3) promotes effectively the Suzuki-Miyaura cross coupling of 1-arylalkenyl phosphates with aryl boronic acids with yields attaining 99%.
Reductive Activation and Hydrofunctionalization of Olefins by Multiphoton Tandem Photoredox Catalysis
作者:Milena L. Czyz、Mitchell S. Taylor、Tyra H. Horngren、Anastasios Polyzos
DOI:10.1021/acscatal.1c01000
日期:2021.5.7
of olefin feedstocks to architecturally complex alkanes represents an important strategy in the expedient generation of valuable molecules for the chemical and life sciences. Synthetic approaches are reliant on the electrophilicactivation of unactivated olefins, necessitating functionalization with nucleophiles. However, the reductive functionalization of unactivated and less activatedolefins with
Traceless directing group mediated branched selective alkenylation of unbiased arenes
作者:Soumitra Agasti、Aniruddha Dey、Debabrata Maiti
DOI:10.1039/c6cc07032a
日期:——
–COOH group assisted branched selective olefination of simple arenes.
–COOH基团辅助简单芳烃的分支选择性烯基化。
Cobalt-Catalyzed Asymmetric Hydrogenation of 1,1-Diarylethenes
作者:Jianhui Chen、Chenhui Chen、Chonglei Ji、Zhan Lu
DOI:10.1021/acs.orglett.6b00453
日期:2016.4.1
Highlyenantioselective cobalt-catalyzed hydrogenation of 1,1-diarylethenes was developed by using bench-stable chiral oxazoline iminopyridine–cobalt complexes as precatalysts. A unique o-chloride effect was observed to achieve high enantioselectivity. Easy removal as well as further transformations of the chloro group make this protocol a potentially useful alternative to synthesize various chiral
Photoinduced Hydroarylation and Cyclization of Alkenes with Luminescent Platinum(II) Complexes
作者:Hanchao Cheng、Tsz‐Lung Lam、Yungen Liu、Zhou Tang、Chi‐Ming Che
DOI:10.1002/anie.202011841
日期:2021.1.18
Photoinduced hydroarylation of alkenes is an appealing synthetic strategy for arene functionalization. Herein, we demonstrated that aryl radicals generated from electron‐deficient aryl chlorides/bromides could be trapped by an array of terminal/internal aryl alkenes in the presence of [Pt(O^N^C^N)] under visible‐light (410 nm) irradiation, affording anti‐Markovnikov hydroarylated compounds in up to
烯烃的光诱导加氢芳基化是芳烃官能化的一种有吸引力的合成策略。在此,我们证明了在可见光下,[Pt(O ^ N ^ C ^ N)]存在下,电子不足的芳基氯化物/溴化物产生的芳基自由基可能被一系列末端/内部芳基烯烃捕获(410)。纳米)辐射,以高达95%的收率提供抗马氏化学水解的化合物。此外,还开发了一种用于[Pt(O ^ N ^ C ^ N)]催化的丙烯酰胺分子内光环化反应的化合物,以提供结构多样的3,4-二氢喹啉酮。