Using metal carbonyl fragments as templates, the directed, bridging alkylation of ligating dithiolates yields macrocyclic polythioethers. Treatment of cis-[Fe(CO)2-(S2C6H4)2]2− (1) with S(C2H4Br)2, in THF at room temperature, gives [Fe(CO)-(dpttd)] (2) (dpttd2− = 2,3,11,12-dibenzo-1,4,7,10,13-pentathiatridecane(2−)), which is alkylated by yet another S(C2H4Br)2 under reflux to give dibenzo-18-crown-S6
使用羰基
金属片段作为模板,连接的二
硫醇盐的定向桥联烷基化反应会生成大环聚
硫醚。在室温下于THF中用S(C 2 H 4 Br)2处理顺式-[Fe(CO)2-(S 2 C 6 H 4)2 ] 2-(1)。 (dpttd)](2)(dpttd 2- = 2,3,11,12-dibenzo-1,4,7,10,13-pentathiatridecane(2-)),被另一个S(C 2 H 4 Br)2回流得到dibenzo-18-crown-S6(3),经过
水解和后处理后产率为68%。S(C 2 H 4 Br)2在THF中将[Fe(CO)2 dttd](dttd 2 = 2,3,8,9-二苯并-1,4,7,10-四噻烷(2-))烷基化在回流下,以20%的产率类似地得到二苯并-15-冠-S5(4)。4也通过烷基化得到2与1,2--C 2 H ^ 4
溴2,但在较低的产率。由于每个Ç 6 ħ 4小号2 2-