摘要 |
<p>The parent (7044632) describes bidentate coordination cpds. useful in soluble catalytic compsns. for asymmetric syntheses, e.g., asymmetric hydrogenation of unsatd. cpds. and of formula: where X and Y are indep. P,As, Sb or N; M is a transition metal; R is (cyclo)aliphatic or aromatic residue and R1 is hydrocarbon residue contg. >=1 asymmetric C and opt. O or N, the asymmetric C atom being opt. in a ring; A is an anion and p is the oxidn. state of the metal. The patent of addn. claimes polymeric coordinating cpds. of formulae (II) or (III): where X and Y are as defined; R, R4 and A are (cyclo)aliphatic or aromatic hydrocarbon residue; R5 is H, one of the defined hydrocarbon residues and n is >1,000.</p> |