Molecular asymmetry of an N-alkylporphyrin with enantiotopic faces. Resolution and spectroscopic characterizations of optical antipodes of N-methyletioporphyrin I
The optical antipodes of N-methyletioporphyrin I were resolved and characterized as the zinc complex with a chiral axial ligand by n.m.r. spectroscopy.
N-methylation of etioporphyrin I and octaalkyl-5-azaporphyrins
作者:Ajita M. Abeysekera、Ronald Grigg、Jadwiga Trocha-Grimshaw、Kim Henrick
DOI:10.1016/0040-4020(80)80088-3
日期:1980.1
Improved procedures are reported for the preparation of mono-, di- and tri-N-methyl-etioporphyrin I. Demethylation of Na, Nb, Nc-trimethyletioporphyrin I under acidic, basic or thermal conditions gives Na, Nb-dimethyl etioporphyrinI. N-Methylation of octaalkyl-5-azaporphyrins leads, in general, to mixtures of the isomeric mono-, di- and tri-N-alkylated 5-azaporphyrins. An X-ray crystal structure of
改进程序报道了单- ,二-和N个三-N-甲基初卟啉I.去甲基化制备一,N b,N Ç -trimethyletioporphyrin我酸性,碱性或热条件下给出n一个,N b - I.八烷基-5-氮杂卟啉的N-甲基化通常导致异构的单,二和三N-烷基化的5-氮杂卟啉的混合物。N a,N b-二甲基卟啉I三碘化物的X射线晶体结构证实了N-Me基团的反式排列。两个N-甲基化的吡咯环彼此扭曲27°。