Copper bisphosphine complex

A series of homoleptic copper(i), silver(i), and gold(i) complexes of two bisphosphine ligands l,2-bis(diphenylphosphino)benzene, dppb bis[2-(diphenylphosphino)phenyl]ether, POP has been studied to demonstrate that these species are very low emissive in solution but highly luminescent in the solid state. In particular, the silver and copper complexes afford quite broad electroluminescence spectra with white light emission when used in the fabrication of light-emitting devices. ... 

Addition reactions of dienolates and aldehydes can also be effected through the use of bisphosphine copper(I) complexes [145, 146]. A mixture of p-Tol-BINAP, Cu(0Tf)2, and (Bu4N)Ph3Sip2 leads to a complex that efficiently promotes rapid aldol addition reactions of acetoacetate-derived dienolates to give adducts with high yields and selectivities. The addition to crotonaldehyde served as an important launch point in Carreira s total syn-... 

A highly enantioselective reduction of o /3-unsaturated nitriles has been conducted by using a Cu(OAc)2-josiphos complex as the catalyst under hydrosilylation conditions. This reaction provides access to valuable /3-aryl-substituted chiral nitriles in good yields and with excellent enantioselectivities by employing a stable catalytic pre- cursor and a readily available commercial bisphosphine ligand. The active reducing species is believed to be copper hydride.315... 

Five- and six-membered /3-hydroxylactones have been synthesized diastereo- and (g) enantio-selectively from a,/l-unsaturated esters bearing a ketone tethered as the ester R group, in an intramolecular reductive aldol reaction catalysed by chiral bisphosphine complexes of copper .133... 

The addition of B pin to activated alkenes is an efficient way to generate alkylboronates. One version of this reaction entailed the use of a platinum complex to catalyze the addition, which generated remarkably high yields of the boronates when heated (Scheme 6.6) [12, 13]. While there was some substrate specificity, this was an effective approach to the synthesis of alkylboronate compounds from Michael acceptors. It should be noted that a chiral imidazolinium salt catalyzed the enantioselective borylation of acyclic enones with excellent selectivity (up to er=98 2 [ 14]). The copper-catalyzed borylation of cyclopropenes has also been reported using bisphosphine as the chiral ligand (Schanes 6.7 and 6.8) [15,16] in... 

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