Diastereomerism in palladium(II) allyl complexes of P,P-, P,S- and S,S-donor ligands, Ph2P(E)N(R)P(E′)Ph2 [R=CHMe2 or (S)-*CHMePh; E=E′=lone pair or S]: solution behaviour, X-ray crystal structure and catalytic allylic alkylation reactions
作者:Swadhin K. Mandal、G.A. Nagana Gowda、Setharampattu S. Krishnamurthy、Chong Zheng、Shoujian Li、Narayan S. Hosmane
DOI:10.1016/s0022-328x(03)00227-4
日期:2003.6
syn/anti-) in solution. Analogous allyl palladium complexes derived from the chiral homodonor diphosphazane ligand, Ph2PN((S)-*CHMePh)PPh2 (3) exist as a single species when the allyl moiety is symmetrical (R′=R″=H or Ph) but a 1:1 mixture of two different face-coordinated diastereomers if the allyl moiety is unsymmetrically substituted (R′≠R″). The 1,3-dimethyl–allyl complex, [Pd(η3-1,3-Me2C3H3)Ph2PN
非手性同位体二磷氮烷配体Ph 2 P(E)N(CHMe 2)P(E')Ph 2 [E = E'=孤对(1)或S(2)]与氯桥钯二聚体的反应, [将Pd(η 3 -1,3-R'-R“C 3 H ^ 3)(μ-Cl)的] 2(R',R”= H,Me或PH)在NH 3的存在下4 PF 6给予的阳离子η 3 -烯丙基钯络合物,[将Pd(η 3 -1,3-R'-R“C 3 ħ 3)(L-L')。这些复合物的形式存在,除1,3-二甲基烯丙基络合物,其以两种异构体在溶液中单种(顺/ syn-和syn / anti-)的解决方案。当烯丙基部分对称时(R'= R''= H或Ph),衍生自手性同位体二磷氮烷配体Ph 2 PN((S)-* CHMePh)PPh 2(3)的类似烯丙基钯配合物存在但是,如果烯丙基部分不对称取代(R'≠R”),则是两种不同的面配位非对映异构体的1:1混合物。1,3-二甲基-烯丙基配合物,[将Pd(η