Nucleophilic additions of phenylsulfonyl-substituted tricarbonyl(1,3-cyclohexadiene)iron complexes
作者:Shang-Shing P Chou、Shih-Hsien Liu
DOI:10.1016/s0022-328x(97)00714-6
日期:1998.3
Tricarbonyl[η4-2-(phenylsulfonyl)-1,3-cyclohexadiene]iron(0) (3) was prepared in good yield from 2-(phenylsulfonyl)-1,3-cyclohexadiene and Fe2(CO)9 using azadiene 2 as the catalyst. The reaction of 3 with nucleophiles proceeded only at the C-4 position under thermodynamic (25°C) or kinetic (−78°C) condition. Careful treatment of 3 with Ph3CPF6 at low temperature regiospecifically gave the tricarbo
三羰基[ η 4 -2-(苯磺酰基)-1,3-环己二烯]铁(0)(3)中的溶液以良好的收率制备由2-(苯基磺酰基)-1,3-环己二烯和Fe 2(CO)9使用氮杂二烯2作为催化剂。3与亲核试剂的反应仅在热力学(25°C)或动力学(-78°C)条件下在C-4位置进行。的小心处理3的Ph 3 CPF 6在低温区域专一性,得到三羰基[(1-5- η 5)-3-(苯基磺酰基)环己二烯基]铁(I)络合物6。的η 5 -配合物6比更具反应性的η 4 -配合物3,并与各种亲核立体和区域专一性在C-1位反应。可以将加成产物9脱金属以得到官能化的二烯基砜10。