Facile one-pot synthesis of BINOL- and H8-BINOL-based aryl phosphites and their use in palladium catalysed asymmetric allylation
摘要:
Novel P-monodentate aryl phosphite ligands have been synthesised in one step from (R)-BINOL, (R)-H-8-BINOL and (R)-H-8-3, 3'-dibromo-BINOL. With the new aryl phosphites, up to 86% ee was observed in the asymmetric Pd-catalysed amination of 1,3-diphenyl-2propenyl acetate with sodium diformylamide. In the enantioselective alkylation of 1,3-diphenyl-2-propenyl acetate with dimethyl malonate, up to 97% enantioselectivity was achieved. (c) 2005 Elsevier Ltd. All rights reserved.
Facile one-pot synthesis of BINOL- and H8-BINOL-based aryl phosphites and their use in palladium catalysed asymmetric allylation
摘要:
Novel P-monodentate aryl phosphite ligands have been synthesised in one step from (R)-BINOL, (R)-H-8-BINOL and (R)-H-8-3, 3'-dibromo-BINOL. With the new aryl phosphites, up to 86% ee was observed in the asymmetric Pd-catalysed amination of 1,3-diphenyl-2propenyl acetate with sodium diformylamide. In the enantioselective alkylation of 1,3-diphenyl-2-propenyl acetate with dimethyl malonate, up to 97% enantioselectivity was achieved. (c) 2005 Elsevier Ltd. All rights reserved.
Iridium-Catalyzed Asymmetric Borylation of Unactivated Methylene C(sp<sup>3</sup>)–H Bonds
作者:Ronald L. Reyes、Tomohiro Iwai、Satoshi Maeda、Masaya Sawamura
DOI:10.1021/jacs.9b01952
日期:2019.5.1
Herein, we show the highly enantioselective borylation of unactivated methylene C(sp3)-Hbonds in 2-alkylpyridines and 2-alkyl-1,3-azole derivatives using an iridium-BINOL-based chiral monophosphite catalyst system. Quantum chemical calculations using the artificial force induced reaction (AFIR) method suggested that a monophosphite-Ir-tris(boryl) complex generates a narrow chiral reaction pocket where
Diastereoisomeric hydroformylation catalysts show differences for the catalyst preformation pathway and a strongly reduced n-octene hydroformylation activity for the (S,S,R)-isomer.
Asymmetric Pd-catalyzed allylic amination of 1,3-diphenylallyl acetate with dipropylamine in ionic and molecular solvents
作者:S. E. Lyubimov、V. A. Davankov、A. S. Kucherenko、S. G. Zlotin、S. V. Zheglov、K. N. Gavrilov、P. V. Petrovskii
DOI:10.1007/s11172-006-0155-9
日期:2005.11
Asymmetric catalytic allylic amination of 1,3-diphenylallyl acetate with dipropylamine in an ionic liquid, 1-butyl-2,3-dimethylimidazolium tetrafluoroborate, and in THF and CH2Cl2 in the presence of palladium complexes of P-monodentate phosphite and phosphoramidite derivatives of S-1,1′-bis-2-naphthol was carried out. This gave a product with ee of up to 65%. The level of asymmetric induction is retained after three catalyst cycles.
Gavrilov, K. N.; Mikhel', I. S., Russian Journal of Inorganic Chemistry, <hi>1994</hi>, vol. 39, p. 439 - 441
作者:Gavrilov, K. N.、Mikhel', I. S.
DOI:——
日期:——
Facile one-pot synthesis of BINOL- and H8-BINOL-based aryl phosphites and their use in palladium catalysed asymmetric allylation
作者:Konstantin N. Gavrilov、Sergey E. Lyubimov、Pavel V. Petrovskii、Sergey V. Zheglov、AntonS. Safronov、Roman S. Skazov、Vadim A. Davankov
DOI:10.1016/j.tet.2005.08.046
日期:2005.10
Novel P-monodentate aryl phosphite ligands have been synthesised in one step from (R)-BINOL, (R)-H-8-BINOL and (R)-H-8-3, 3'-dibromo-BINOL. With the new aryl phosphites, up to 86% ee was observed in the asymmetric Pd-catalysed amination of 1,3-diphenyl-2propenyl acetate with sodium diformylamide. In the enantioselective alkylation of 1,3-diphenyl-2-propenyl acetate with dimethyl malonate, up to 97% enantioselectivity was achieved. (c) 2005 Elsevier Ltd. All rights reserved.