(13 and 14) is also described. The application of neutral Pd complexes to catalytic styrene hydrovinylation afforded moderate conversions, high chemoselectivities (>92%) to 3-phenyl-1-butene and up to 43% ee with precursor 12a. Cationic Pd complexes were tested as catalytic precursors in allylicsubstitution of rac-3-acetoxy-1,3-diphenyl-1-propene (rac-I), with the anion of dimethylmalonate and benzylamine
描述了五种PPhArR(Ar = 2-对-叔苯基(a),1-pyrenyl(b); R = OMe,Me,i -Pr)的光学纯的P-立体单膦的合成。充分表征了配体,并通过X射线衍射证实了PPh(1-吡啶基)R的绝对构型(3b和5b; R分别为OMe和Me)。的单膦与Pd和Ru的有机金属单元的络合产生的中性配合物[的PdCl(η 3 -2- ME-烯丙基)P](10-12)和将[RuCl 2(η 6 - p -cymene)P](16 –18)。完整的特征,包括对晶体结构的测定将[RuCl 2(η 6 - p -cymene)(PMePh(2- p -三联苯))](17A)被提供。根据NMR,中性钯络合物以溶液中两种非对映异构体的混合物形式出现。4个阳离子的合成和表征[加入Pd(η 3 -2- ME-烯丙基)(P)2 ] PF 6(13和14)也被描述。中性钯络合物在催化苯乙烯加氢乙烯基化反
10.1021/jacs.4c03686
作者:Shen, Hong-Cheng、Wang, Ze-Shu、Noble, Adam、Aggarwal, Varinder K.
DOI:10.1021/jacs.4c03686
日期:——
and even tertiaryboronicesters to be employed, and can be used to prepare any of the four possible stereoisomers of a coupled product with vicinal chiral centers. The new method, which combines the simultaneous enantiospecific reaction of a chiral nucleophile with the enantioselective reaction of a chiral electrophile in a single process, offers a solution for stereodivergent cross-coupling of two
Reactions of diphenylphosphinoyl radicals with 5-aryl-2-pentenoates or beta-phenylethylene styrenes generate trans-substituted tetrahydronaphthalenes through a cascade reaction sequence.