作者:Marek Necas、Mark R. St J. Foreman、Jaromír Marek、J. Derek Woollins、Josef Novosad
DOI:10.1039/b103501k
日期:——
Unsymmetrical bidentate ligands R2P(E)âN(H)âP(Eâ²)R2â²
[R, Râ²
 = Ph, OPh, iPr; E, Eâ²
 = O, S, Se] have been synthesised using the condensation reaction of an amino compound, R2P(E)NH2
[RÂ =Â PhO, Ph; EÂ =Â O, S, Se], with a phosphorus electrophile, R2â²P(Eâ²)Cl [Râ²
 =Â
iPr, Ph, OPh; Eâ²
 = O, S, Se]. Deprotonated ligands (with KOtBu) can be treated with Pd(OAc)2 to give [Ph2P(S)âNâP(O)(OPh)2]2Pd, [iPr2P(S)âNâP(O)(OPh)2]2Pd and [Ph2P(S)âNâP(S)(OPh)2]2Pd, which show either four-membered or six-membered chelate rings. The new compounds were studied spectroscopically (NMR, IR and Raman) and by X-ray crystallography.
不对称双齿配体 R2P(E)–N(H)–P(E′)R2′ [R, R′ = Ph, OPh, iPr; E, E′ = O, S, Se] 是通过氨化合物 R2P(E)NH2 [R = PhO, Ph; E = O, S, Se] 与磷电亲体 R2′P(E′)Cl [R′ = iPr, Ph, OPh; E′ = O, S, Se] 的缩合反应合成的。去质子化的配体(与 KOtBu 反应)可以与 Pd(OAc)2 反应,生成 [Ph2P(S)–N–P(O)(OPh)2]2Pd、[iPr2P(S)–N–P(O)(OPh)2]2Pd 和 [Ph2P(S)–N–P(S)(OPh)2]2Pd,这些化合物显示出四元或六元螯合环。新化合物通过光谱学(NMR、IR 和拉曼)和 X 射线晶体学进行了研究。