First total synthesis of (−)- and (+)-6-O-desmethylantofine
作者:Meng Wu、Ling Li、Bo Su、Zhihui Liu、Qingmin Wang
DOI:10.1039/c0ob00287a
日期:——
The first total synthesis of (−)-6-O-desmethylantofine (A) and its unnatural enantiomer (+)-6-O-desmethylantofine (B) is described. The synthetic route is efficient and practical with easily available glutamic acid dimethyl ester hydrochloride as the chiral material under mild conditions.
To discover new phenanthroindolizidine and phenanthroquinolizidine alkaloids as potential anticancer drugcandidates, non-natural 6-O-desmethylcryptopleurine (2) and its derivatives were prepared. Most of the new compounds exhibited potent antiproliferative activity against A549 and BEL-7402 cells, with the lowest IC50 being 3 nM. Optically pure 2-R was further evaluated against a panel of 30 cancer