Synthesis and catalytic reactivity of D4-symmetric dinorbornabenzene-derived metallotetraarylporphyrins
作者:Ronald L. Halterman、Shyi-Tai Jan、Heather L. Nimmons、David J. Standlee、Masood A. Khan
DOI:10.1016/s0040-4020(97)00729-1
日期:1997.8
D4-symmetry. The resolved benzaldehyde was synthesized in seven steps from p-benzoquinone and cyclopentadiene and included a resolution via diastereomeric ketals. A manganese chloride complex of porphyrin 1 was used as a catalyst for the asymmetric epoxidation of aromatic substituted alkenes in the presence of excess sodium hypochlorite in up to 7,200 turnovers and up to 76% e.e and >90% yield.
拆分的C 2对称苯甲醛1,2,3,4,5,6,7,8-八氢-1:4,5:8-二甲基蒽蒽-9-羧基醛与吡咯的缩合生成第一个手性四芳基卟啉1表现出d 4 -symmetry。从对苯醌和环戊二烯经七个步骤合成了拆分的苯甲醛,并通过非对映体缩酮进行拆分。在过量的次氯酸钠存在下,卟啉1的氯化锰络合物被用作芳香族取代烯烃的不对称环氧化的催化剂,其最高可达7200倍营业额,最高ee为76%,收率> 90%。