Auration of Thiophene and Furan: Structures of the 2-Mono- and 2,2-Diaurated Products
作者:Keith A. Porter、Annette Schier、Hubert Schmidbaur
DOI:10.1021/om030575f
日期:2003.11.1
the general formula 2-[(L)Au]C4H3E, with L = Ph3P or Ph3As and E = O or S, were all found to have conventional structures with parameters representing classical types of metalated aromatic heterocycles. Crystals of the arsenic analogue, 2-[(Ph3As)Au]C4H3O, are isomorphous with the Ph3P complex. The products of the second auration step, with the general formula 2,2-[(L)Au]2C4H3E}+BF4- (L = Ph3P; E =
在非常温和的条件下,噻吩在四氢呋喃中被四氟硼酸三苯基膦金(I)进行亲电取代,从而直接得到2,2-渗氮阳离子2,2-[(Ph 3 P)Au] 2 C 4 H 3 S} +作为BF 4 -的盐。通过单价的2-[((Ph 3 P)Au] C 4 H 3 S分子,在两步过程中获得相同的产物,该分子添加1当量的[(Ph 3 P)Au] BF 4。噻吩化合物与同样通过该途径制备的单呋喃和呋喃呋喃类似物一起在单晶X射线研究中进行了结构表征。发现通式2-[((L)Au] C 4 H 3 E,L = Ph 3 P或Ph 3 As,E = O或S的单核配合物均具有常规结构,其参数代表经典类型金属化的芳香族杂环。砷类似物2-[((Ph 3 As)AuC 4 H 3 O ]的晶体与Ph 3 P络合物同构。通式为2,2-[(L)Au] 2 C 4的第二个净化步骤的产物ħ 3 é} + BF 4 -(L =苯基3