A new ferrocenyl oxazaphospholidine oxide 3 was synthesized together with its P-epimer 2 in the reaction of ferrocene lithium with phosphoramidite chloride 1. 3 was successfully derivatized into planar chiral 1,2-ferrocenes, including phosphine ligands, via highly diastereoselective ortho-lithiation and subsequent functionalization; these compounds display opposite planar chirality to those obtained from 2. Some of these 1,2-ferrocenes were further lithiated, allowing for the introduction of a free phosphine group at the oxazaphospholidine ring. The X-ray structures of the compounds 2 and 3 as well as those of the new 1,2-ferrocenes 4 and 7 have been determined.
在
二茂铁锂与亚
磷酰胺
氯化物 1 的反应中,合成了一种新的
二茂铁基
噁唑磷啶氧化物 3 及其 P-epimer 2。通过高非对映选择性的正交石化作用和随后的官能化反应,3 成功衍生为平面手性 1,2-
二茂铁,包括
膦配体;这些化合物显示出与 2 相反的平面手性。化合物 2 和 3 以及新的 1,2-
二茂铁 4 和 7 的 X 射线结构已经确定。