| 摘要 |
<p>Ligands represented by the general formula (1) (wherein R?1, R2 and R3¿ are each a substituent on the aromatic ring; X is P or As; and n is 1 to 3). Asymmetric catalysts composed of metals and these ligands coordinating thereto in the catechol moiety are useful in the preparation of siloxynitriles.</p> |
