Synthesis of Ginseng Diyne Analogues and Their Antiproliferative Activity against L1210 Cells
摘要:
Some analogues of Ginseng diyne were synthesized and tested for antiproliferative activity against L1210 cells. The epoxy moiety of panaxydol, isolated from the root of Panax ginseng, proved to be in the cis-form on comparison with synthetic specimens. Analysis of structure-activity relationship revealed that the presence of the heptadec-1-ene-4,6-diyn-3-ol moiety in the structure of the analogues was essential for their antiproliferative activity and that the epoxy and alkyl groups in the structure contributed to enhancement of the antiproliferative activity.
The highly α,α′ selective and stereocontrolled homocoupling reaction of allylic halides was achieved using barium reagent. The double-bond geometry of the starting allylic chloride was completely retained. The α,α′ cross-coupling products were also prepared stereospecifically and regioselectively by this method.
作者:Noel P. McLaughlin、Eibhlín Butler、Paul Evans、Nigel P. Brunton、Anastasios Koidis、Dilip K. Rai
DOI:10.1016/j.tet.2010.10.049
日期:2010.12
A short, practical synthesis of the bis-acetylenic natural product falcarinol 1 is reported. This method relies on the alternate functionalisation of bis-trimethylsilylbutadiyne 10. This may be achieved in one-pot, however, better yields were obtained more conventionally. Lipase mediated enzymatic kinetic resolution of the racemic adduct in an organic solvent afforded (+)-1 in 97% enantiomeric excess
The highly alpha,alpha' selective and stereocontrolled homocoupling reaction of allylic halides was achieved using barium reagent. The double-bond geometry of the starting allylic chloride was completely retained. alpha,alpha' Cross-coupling products were also prepared stereospecifically and regioselectively by this method.
OSADCHIJ S. A.; TATARINOV V. A.; MAROCHKINA L. YA.; PANKRUSHINA N. A.; GR+, IZV. SIB. OTD. AN CCCP <IZSK-AV>, 1976, HO 9, CEP. XIM. N., VYP. 4, 59-63
作者:OSADCHIJ S. A.、 TATARINOV V. A.、 MAROCHKINA L. YA.、 PANKRUSHINA N. A.、 GR+