Pyrrolylpolyenes. Part3. Synthesis of all-(E)-wallemia C and stereochemistry of natural wallemia C
作者:Masayoshi Ito、Kiyoshi Tsukida、Trevor P. Toube
DOI:10.1039/p19810003255
日期:——
2-Dimethyl-5-[(5E)-5-methyl-6-pyrrol-2-ylhexa-1,3,5-trienyl]fura n -3(2H)-one (7) and its lower vinylogue (9) have been synthesised. Comparison of the spectra of compound (7) with those of natural wallemia C (2) has established the Z-stereochemistry of the trisubstituted double bond in the natural pigment.
2,2-二甲基-5-[(5 E)-5-甲基-6-吡咯-2-基己基1,3,5-三烯基]呋喃n -3(2 H)-一(7)及其更低乙烯基(9)已合成。将化合物(7)的光谱与天然壁血病C(2)的光谱进行比较,确定了天然颜料中三取代双键的Z-立体化学。