METHOD FOR RECOVERING DIPHENYLPROLINOL TYPE CATALYSTS WITH PHASE-TAG GROUPS, NEW CATALYSTS RECOVERABLE BY THIS METHOD AND THEIR USE

摘要

The invention relates to a method for recovering a catalyst of formula (II), wherein X1 Y, Z and Ph1 are as defined in the description and in the claims, wherein (1) a mixture comprising said catalyst is evaporated onto a support, and the support is washed first with an aqueous polar solvent and then with a nonaqueous solvent, or (2) a mixture comprising said catalyst is treated with a two-phase liquid system consisting of an aqueous polar phase and of a water immiscible phase: The catalysts of formula (II) comprise phase-tag groups, thus they appear preferentially in a nonaqueous phase, which renders them fully recoverable from a homogeneous reaction mixture. Most of the catalysts of formula (II) are new; the invention also relates to these new compounds.