Palladium-Catalyzed Asymmetric Phosphination. Scope, Mechanism, and Origin of Enantioselectivity
作者:Natalia F. Blank、Jillian R. Moncarz、Tim J. Brunker、Corina Scriban、Brian J. Anderson、Omar Amir、David S. Glueck、Lev N. Zakharov、James A. Golen、Christopher D. Incarvito、Arnold L. Rheingold
DOI:10.1021/ja070225a
日期:2007.5.1
initiated by oxidative addition to Pd(0) yielding Pd((R,R)-Me-Duphos)(Ph)(I) (3). Reversible displacement of iodide by PHMe(Is) gave the cation [Pd((R,R)-Me-Duphos)(Ph)(PHMe(Is))][I] (4), which was isolated as the triflate salt and crystallographically characterized. Deprotonation of 4-OTf with NaOSiMe3 gave the phosphido complex Pd((R,R)-Me-Duphos)(Ph)(PMeIs) (5); an equilibrium between its diastereomers
Oxidative addition of methylene chloride to Me-DuPhos complexes of palladium and rhodium
作者:Perry M. Scheetz、Natalia F. Blank、Sarah K. Gibbons、David S. Glueck、Arnold L. Rheingold
DOI:10.1016/j.ica.2018.08.007
日期:2018.11
Abstract Oxidativeaddition of methylene chloride to Pd((R,R)-Me-DuPhos)(L) (1–3; L = P(t-Bu)3, PCy3, or trans-stilbene) gave Pd((R,R)-Me-DuPhos)(CH2Cl)(Cl) (4). Treatment of [Rh(COD)(Cl)]2 with (R,R)-Me-DuPhos at low temperature in THF or CH2Cl2 afforded [Rh((R,R)-Me-DuPhos)(Cl)]2 (5). At room temperature, these reactions also gave the byproduct [Rh((R,R)-Me-DuPhos)2][Cl], which was prepared independently
Chiral Palladium(0) <i>trans</i>-Stilbene Complexes: Synthesis, Structure, and Oxidative Addition of Phenyl Iodide
作者:Tim J. Brunker、Natalia F. Blank、Jillian R. Moncarz、Corina Scriban、Brian J. Anderson、David S. Glueck、Lev N. Zakharov、James A. Golen、Roger D. Sommer、Christopher D. Incarvito、Arnold L. Rheingold
DOI:10.1021/om050115h
日期:2005.5.1
trans-stilbene. The rate of oxidativeaddition of phenyl iodide to the stilbene complexes, which gave Pd(diphos*)(Ph)(I), depended on the ligand (larger for increased ligand bite angles and reduced steric bulk) and was markedly faster than oxidativeaddition to mixtures of Pd(dba)2 and diphos*. The complexesPd(diphos*)(Ph)(I) were prepared independently by treatment of PdL2(Ph)(I) (L2 = TMEDA, (PPh3)2)