Sterically Controlled, Palladium-Catalyzed Intermolecular Amination of Arenes
作者:Ruja Shrestha、Paramita Mukherjee、Yichen Tan、Zachary C. Litman、John F. Hartwig
DOI:10.1021/ja4032677
日期:2013.6.12
the Pd-catalyzed amination of arenes to form N-aryl phthalimides with regioselectivity controlled predominantly by steric effects. Mono-, di-, and trisubstituted arenes lacking a directing group undergo amination reactions with moderate to high yields and high regioselectivities from sequential addition of PhI(OAc)2 as an oxidant in the presence of Pd(OAc)2 as catalyst. This sterically derived selectivity
Stereocontrolled Synthesis of Fluorinated Isochromans via Iodine(I)/Iodine(III) Catalysis
作者:Joel Häfliger、Olga O. Sokolova、Madina Lenz、Constantin G. Daniliuc、Ryan Gilmour
DOI:10.1002/anie.202205277
日期:2022.7.25
A chiral II/IIII catalysis platform is reported to facilitate the fluorocyclization of 2-vinyl benzaldehydes thereby generating novel fluorinated isochromans in a single operation (up to >95 : 05 d.r. and 97 : 03 e.r.). Not only does the benzylic fluoride shield an oxidatively labile position, X-ray analyses demonstrate that the [CH2-CHF] fragment functions as a stereoelectronic mimic of the O-CH(OR)
据报道,手性 I/I III催化平台可促进 2-乙烯基苯甲醛的氟环化,从而在一次操作中生成新型氟化异色满(高达 >95: 05 dr . 和 97: 03 er .)。氟化苄不仅屏蔽了氧化不稳定的位置,X射线分析还表明[CH 2 -CHF]片段起到了O -CH(OR)乙缩醛基序的立体电子模拟物的作用。
Inter- and intramolecular hydroacylation of alkenes employing a bifunctional catalyst system
作者:Nicolas R. Vautravers、Damien D. Regent、Bernhard Breit
DOI:10.1039/c1cc10683j
日期:——
Based on a conceptually innovative bifunctional P,N ligand, an efficient protocol for the rhodium-catalyzed inter- and intramolecular hydroacylation of alkenes has been developed.