Total Synthesis of Optically Active Lycopladine A by Utilizing Diastereoselective Protection of Carbonyl Group in a 1,3-Cyclohexanedione Derivative
作者:Kou Hiroya、Yoshihiro Suwa、Yusuke Ichihashi、Kiyofumi Inamoto、Takayuki Doi
DOI:10.1021/jo200418y
日期:2011.6.3
first synthesized from the symmetrical diketone 1a via diastereoselective carbon–oxygen bond formation between one of the carbonyl groups and the chiral alcohol on the C2 side chain in a 2,2-disubstituted 1,3-cycloalkanedione derivative. We also report the total synthesis of natural (+)-lycopladine A [(+)-6] from (7R,7aR)-9 and the formal synthesis of unnatural (−)-lycopladine A [(−)-6] from (7S,7aS)-9
我们成功地从半缩醛2a合成了两个双环烯酮的对映体(7 R,7a R)-和(7 S,7a S)-9,这是我们首先通过对称的二酮1a通过非对映选择性碳-氧键形成而合成的。 2,2-二取代的1,3-环烷二酮衍生物的C 2侧链上的羰基之一和手性醇。我们还报告了从(7 R,7a R)-9合成天然(+)-番茄红素A [(+)- 6 ]和非天然(-)-番茄红素A [(-)- 6 ]的正式合成。从(7 S,7a S)-9。