Remarkably Stable Iron Porphyrins Bearing Nonheteroatom-Stabilized Carbene or (Alkoxycarbonyl)carbenes: Isolation, X-ray Crystal Structures, and Carbon Atom Transfer Reactions with Hydrocarbons
作者:Yan Li、Jie-Sheng Huang、Zhong-Yuan Zhou、Chi-Ming Che、Xiao-Zeng You
DOI:10.1021/ja020391c
日期:2002.11.1
spectrometry, and elemental analyses. X-ray crystal structure determinations of 1.0.5C(6)H(6).0.5CH(2)Cl(2) and 4 reveal Fe=CPh(2) bond lengths of 1.767(3) (1) and 1.827(5) A (4), together with large ruffling distortions of the TPFPP macrocycle. Complexes 2 and 4 are reactive toward styrene, affording the corresponding cyclopropanes in 82 and 53% yields, respectively. Complex 1 is an active catalyst for both
[Fe(TPFPP)] (TPFPP = 内消旋四(五氟苯基)卟啉二价阴离子) 与重氮化合物 N(2)C(Ph)R (R = Ph, CO(2)Et, CO(2)CH(2) 的反应)CH=CH(2)) 得到 [Fe(TPFPP)(C(Ph)R)] (R = Ph (1), CO(2)Et (2), CO(2)CH(2)CH=CH (2) (3)) 的产率为 65-70%。用 N-甲基咪唑 (MeIm) 处理 1 得到加合物 [Fe(TPFPP)(CPh(2))(MeIm)] (4),产率为 65%。这些新的铁卟啉卡宾配合物通过核磁共振和紫外可见光谱、质谱和元素分析进行了表征。1.0.5C(6)H(6).0.5CH(2)Cl(2) 和 4 的 X 射线晶体结构测定显示 Fe=CPh(2) 键长为 1.767(3) (1) 和 1.827(5) ) A (4),以及 TPFPP 大循环的大扰动畸变。配合物