Asymmetric Catalytic Reactions Using P*-Mono-, P*,N- and P*,P*-Bidentate Diamidophosphites with BINOL Backbones and 1,3,2-Diazaphospholidine Moieties: Differences in the Enantioselectivity
作者:Konstantin N. Gavrilov、Sergey V. Zheglov、Eugenie A. Rastorguev、Nikolay N. Groshkin、Marina G. Maksimova、Eduard B. Benetsky、Vadim A. Davankov、Manfred T. Reetz
DOI:10.1002/adsc.201000325
日期:2010.10.4
first time and tested in asymmetric transition metal catalysis. Up to 99% ee was achieved in the rhodium-catalyzed asymmetric hydrogenation of functionalized olefins and in the palladium-catalyzed allylic substitution. The influence of the nature of the donor atoms and denticity on the asymmetric induction is discussed. In addition, the first example of a successful platinum-catalyzed asymmetric allylic
MOP-Type Binaphthyl Phosphite and Diamidophosphite Ligands and Their Application in Catalytic Asymmetric Transformations
作者:Konstantin N. Gavrilov、Sergey E. Lyubimov、Sergey V. Zheglov、Eduard B. Benetsky、Pavel V. Petrovskii、Eugenie A. Rastorguev、Tatiana B. Grishina、Vadim A. Davankov
DOI:10.1002/adsc.200600340
日期:2007.5.7
Monodentate phosphite and diamidophosphite ligands have been developed based on O-methyl-BINOL. These chiral ligands are easy to prepare from readily accessible phosphorylating reagents – (Sa or Ra)-2-chlorodinaphtho[2,1-d:1′,2′-f][1,3,2]dioxaphosphepine and (2R,5S)-2-chloro-3-phenyl-1,3-diaza-2-phosphabicyclo[3.3.0]octane. The new ligands have demonstrated excellent enantioselectivity in the palladium-catalysed
基于O-甲基-BINOL已经开发了单齿亚磷酸酯和亚氨基二亚磷酸酯配体。这些手性配体很容易从容易获得的磷酸化试剂中制备-(S a或R a)-2-氯二萘并[2,1- d:1',2'- f ] [1,3,2]二氧杂磷平和(2R ,5S)-2-氯-3-苯基-1,3-二氮杂-2-磷酸双环[3.3.0]辛烷。新的配体在(E)-1,3-二苯基烯丙基乙酸酯与对甲苯磺酸钠(最高99%ee),吡咯烷(最高97%ee)的钯催化的烯丙基取代反应中表现出优异的对映选择性),二丙胺(最高95%ee)和丙二酸二甲酯(最高99%ee)。在钯催化的乙基(E)-1,3-二苯基碳酸烯丙酯的脱硫反应中,实现了高达96%的对映选择性。所述diamidophosphite配体在衣康酸二甲酯(高达90%的Rh的催化不对称氢化表现出很好的对映选择性EE)。
Bulky<i>P*</i>-Chirogenic Diazaphospholidines as Monodentate Ligands for Asymmetric Catalysis
作者:Konstantin N. Gavrilov、Eduard B. Benetskiy、Tatiana B. Grishina、Eugenie A. Rastorguev、Marina G. Maksimova、Sergey V. Zheglov、Vadim A. Davankov、Benjamin Schäffner、Armin Börner、Stephane Rosset、Gaelle Bailat、Alexandre Alexakis
DOI:10.1002/ejoc.200900058
日期:2009.8
been designed and developed. Ligands of this type exhibited high enantioselectivities in Pd-catalysed allylic substitution reactions of (E)-1,3-diphenylallyl acetate with NaSO2pTol (up to 87 % ee), CH2(CO2Me)2 (up to 92 % ee), (C3H7)2NH (up to 93 % ee) and (CH2)4NH (up to 99 % ee). These novel stereoselectors have also been successfully employed in Rh-catalysed asymmetric hydrogenations of dimethyl itaconate
(S)-6-Bromo-BINOL-based phosphoramidite ligand with C1 symmetry for enantioselective hydrogenation and allylic substitution
作者:Konstantin N. Gavrilov、Eduard B. Benetsky、Vladimir E. Boyko、Eugenie A. Rastorguev、Vadim A. Davankov、Benjamin Schäffner、Armin Börner
DOI:10.1002/chir.20845
日期:2010.10
(S)‐6‐Br‐BINOL‐derived phosphoramidite, a simple monodentateligand with a stereogeniccenter at the phosphorus atom, was synthesized for the first time. This stereoselector generated a high level of enantioselectivity (80–95% ee) in the rhodium‐catalyzed hydrogenation of α‐dehydrocarboxylic acid esters and was also successfully employed in the asymmetric palladium‐catalyzed allylic substitution of
A P∗-chiral bisdiamidophosphite ligand with a 1,4:3,6-dianhydro-d-mannite backbone and its application in asymmetric catalysis
作者:Konstantin N. Gavrilov、Sergey V. Zheglov、Pavel A. Vologzhanin、Marina G. Maksimova、Anton S. Safronov、Sergey E. Lyubimov、Vadim A. Davankov、Benjamin Schäffner、Armin Börner
DOI:10.1016/j.tetlet.2008.03.042
日期:2008.5
A novel readily available P,P-bidentate diamidophosphiteligand with P∗-stereocentres is prepared from an inexpensive C2-symmetric 1,4:3,6-dianhydro-d-mannite. By using this efficient ligand, up to 98% ee is achieved in Pd-catalysedasymmetric allylic alkylation, up to 92% ee in Pd-catalysedasymmetric allylic amination and up to 87% ee in Rh-catalysed asymmetric hydrogenation. The influence of the