摘要:
一种具有聚亚甲基链和末端庞大芳基的N-烷基联吡啶盐,[4,4'-联吡啶-N-(CH\({}_{2}\))\({}_{10}\)OC\({}_{6}\)H\({}_{3}\)-3,5-二叔丁基]Cl ([1a]Cl),与K[PtCl\({}_{3}\)(dmso)]反应生成具有N-烷基联吡啶盐配体的Pt复合物,即[Cl\({}_{2}\)(dmso)Pt{4,4'-联吡啶-N-(CH\({}_{2}\))\({}_{10}\)OC\({}_{6}\)H\({}_{3}\)-3,5-二叔丁基}][PtCl\({}_{3}\)(dmso)]作为反式和顺式异构体的6:1混合物([trans-2a][PtCl\({}_{3}\)(dmso)]和[cis-2a][PtCl\({}_{3}\)(dmso)]).将α-环糊精(α-CD)加入到dmso-d\({}_{6}\)/D\({}_{2}\)O(3:1)中的[1a]Cl溶液中,生成[2]伪轮烷[{4,4'-联吡啶-N-(CH\({}_{2}\))\({}_{10}\)OC\({}_{6}\)H\({}_{3}\)-3,5-二叔丁基}·(α-CD)]Cl ([3a]Cl),其在溶液中与[1a]Cl和α-CD处于平衡状态.K[PtCl\({}_{3}\)(dmso)]与[3a]Cl反应得到[2]轮烷[trans-Cl\({}_{2}\)(dmso)Pt{4,4'-联吡啶-N-(CH\({}_{2}\))\({}_{10}\)OC\({}_{6}\)H\({}_{3}\)-3,5-二叔丁基}·(α-CD)][PtCl\({}_{3}\)(dmso)]([trans-4a][PtCl\({}_{3}\)(dmso)]),其中α-CD和[trans-2a][PtCl\({}_{3}\)(dmso)]分别为环状和轴向组分.将[trans-2a][PtCl\({}_{3}\)(dmso)]、[cis-2a][PtCl\({}_{3}\)(dmso)]和α-CD的混合物溶解在dmso-d\({}_{6}\)/D\({}_{2}\)O (3:1)中,形成含有[trans-4a-d\({}_{6}\)][PtCl\({}_{3}\)(dmso)]和[cis-4a-d\({}_{6}\)][PtCl\({}_{3}\)(dmso)]的轮烷混合物.该反应涉及从[trans-2a][PtCl\({}_{3}\)(dmso)]或[cis-2a][PtCl\({}_{3}\)(dmso)]中的Pt部分解离联吡啶盐,生成[1a][PtCl\({}_{3}\)(dmso)]并与α-CD形成伪轮烷,随后联吡啶盐重新配位到Pt.Pt-N配位键的可逆形成在N-丁基化合物[trans-Cl\({}_{2}\)(dmso)Pt{4,4'-联吡啶-N-nBu}][PtCl\({}_{3}\)(dmso)]([trans-2b][PtCl\({}_{3}\)(dmso)])的dmso溶液中进行了研究.