Chiral Birch reduced tertiary phosphines: precursors to asymmetric 1,2-cyclohexenebis(tertiary phosphines).
The first examples of an optically active Birch reduced tertiary phosphine, viz. (R(P))-(cyclohexa-2,5-dienyl)(3-pentyl)phenylphosphine, and successful hydrophosphination of the related racemic ligand (±)-(cyclohexa-2,5-dienyl)(2-propyl)phenylphosphine with PHPh(2) in the presence of KOBu(t) in thf to give a 1,2-cyclohexenebis(tertiary phosphine), viz. (±)-1,2-C(6)H(8)(PPh(2))(PPhPr(i)), are described; as confirmed by crystal structure determinations of [SP-4-4-(S(P),S)]-chloro[(cyclohexa-2,5-dienyl)(3-pentyl)phenylphosphine][2-{1-(dimethylamino)ethyl}phenyl-C,N]palladium(II) and [SP-4-3-(±)]-dimethyl[(1-diphenylphosphino)(2-isopropylphenylphosphino)cyclohexene]platinum(II).
Bulbrook
Michelle
M
Research School of Chemistry, College of Physical Sciences, Australian National University, Canberra, ACT 0200, Australia.
Chu
Minghui
M
Deane
Karen
K
Doyle
Roy J
RJ
Hinc
Justina
J
Peterson
Charlotte
C
Salem
Geoffrey
G
Thorman
Nadia
N
Willis
Anthony C
AC