Cu/Pd cooperatively catalyzed tandem intramolecular anti-Markovnikov hydroarylation of unsaturated amides: facile construction of 3,4-dihydroquinolinones via borylation/intramolecular C(sp3)–C(sp2) cross coupling
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。
The photochemicalreactions of 2-substituted N-(2-halogenoalkanoyl) derivatives 1 of anilines and 5 of cyclic amines are described. Under irradiation, 2-bromo-2-methylpropananilides 1a – e undergo exclusively dehydrobromination to give N-aryl-2-methylprop-2-enamides (=methacrylanilides) 3a – e (Scheme 1 and Table 1). On irradiation of N-alkyl- and N-phenyl-substituted 2-bromo-2-methylpropananilides
描述了苯胺的 2-取代的 N-(2-卤代烷酰基) 衍生物 1 和环胺的 5 的光化学反应。在辐照下,2-溴-2-甲基丙酰苯胺 1a – e 仅进行脱溴氢反应,得到 N-芳基-2-甲基丙酰苯胺(=甲基丙烯酰苯胺)3a – e(方案 1 和表 1)。在辐照 N-烷基和 N-苯基取代的 2-溴-2-甲基丙苯胺 1f – m 时,环化产物,即 1,3-二氢-2H-吲哚-2-酮 (=oxindoles) 2f – m 和 3 ,4-二氢喹啉-2(1H)-ones (=dihydrocarbostyrils) 4f – m, 除了 3f – m。另一方面,N-甲基取代的 2-氯-2-苯基乙酰苯胺 1o - q 和 2-氯乙酰苯胺 1r 的辐照产生了羟吲哚 2o - r 作为唯一的产物,但收率低(方案 3 和表 2)。相应的 N-苯基衍生物 1s - v 光环化为羟吲哚 2s - v 进行顺利。提出了形成光产物的合理机制(方案
Accessing 3,4-Dihydroquinolinone from <i>N</i>-Arylacrylamides via Tetralone-Mediated Energy Transfer and 1,3-Hydrogen Shift
modifications of a number of complex drug molecules. Mechanistic studies reveal that the present systems with ultraviolet light irradiation enable the cyclization via energy transfer and exclusive 1,3-hydrogenshift.
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。
Cu/Pd cooperatively catalyzed tandem intramolecular anti-Markovnikov hydroarylation of unsaturated amides: facile construction of 3,4-dihydroquinolinones <i>via</i> borylation/intramolecular C(sp<sup>3</sup>)–C(sp<sup>2</sup>) cross coupling
作者:Zhijie Kuang、Bingnan Li、Qiuling Song
DOI:10.1039/c7cc07180a
日期:——
An anti-Markovnikov hydroarylation of unsaturated amides via a Cu/Pd synergistically catalyzed cascade borylation/intramolecular sp2–sp3 cross coupling has been disclosed.