Enantioselective synthesis of some tetrahydroisoquinoline and tetrahydro-β-carboline alkaloids
作者:Joanna Szawkało、Stefan J. Czarnocki、Anna Zawadzka、Krystyna Wojtasiewicz、Andrzej Leniewski、Jan K. Maurin、Zbigniew Czarnocki、Józef Drabowicz
DOI:10.1016/j.tetasy.2007.01.014
日期:2007.2
Four alkaloids: (R)-(+)-cryspine A 5, (R)-(+)-octahydroindolo[2,3-a]quinolizidine 8, (R)-(+)-harmicine 19 and (R)-(+)-desbromoarborescidine 22 were prepared via the asymmetric transfer hydrogenation reaction of a prochiral enamine (iminium salt). The enantiomeric excesses of the isolated alkaloids were determined from their 1H NMR spectra measured in the presence of (+)-(R)-tert-butylphenylphosphinothio(seleno)ic
四种生物碱:(R)-(+)-地平A 5,(R)-(+)-八氢吲哚并[2,3- a ]喹唑烷8,(R)-(+)-毒品19和(R)-(通过前手性烯胺(亚胺盐)的不对称转移氢化反应制备了+)-去溴阿糖胞苷22。根据在(+)-(R)-叔存在下测得的1 H NMR光谱确定分离出的生物碱的对映体过量-丁基苯基膦硫基(硒)酸作为手性溶剂。在所有情况下,通过X射线晶体学证实了新产生的立体碳原子上的绝对构型。
BREMNER, JOHN B.;JATURONRUSMEE, WASNA, AUSTRAL. J. CHEM., 42,(1989) N1, C. 1951-1960
作者:BREMNER, JOHN B.、JATURONRUSMEE, WASNA
DOI:——
日期:——
Bremner John B., Eschler Bart M., Skelton Brian W., White Allan H., Austral. J. Chem, 47 (1994) N 10, S 1935-1952
作者:Bremner John B., Eschler Bart M., Skelton Brian W., White Allan H.
DOI:——
日期:——
FUJI T.; NOHARA M.; MITSUKUCHI M.; OHBA M.; SHIKATA K.; YOSHIFUGI S.; IKE+, CHEM. AND PHARM. BULL. <CPBT-AL>, 1975, 23, NO 1, 144-156