La 合成 de l'octahydro pentahydroxy-1,2,3,4,7 dioxolo-1,3 [4,5-j] phenanthridinone-6 a ete effectuee; le controlestereochimique de la synthese est 实现 par une serie de reactor de fonctionalisations cis vicinales
Total Synthesis of Pancratistatin Relying on the [3,3]-Sigmatropic Rearrangement
作者:Hyojin Ko、Eunkyung Kim、Jae Eun Park、Deukjoon Kim、Sanghee Kim
DOI:10.1021/jo035371n
日期:2004.1.1
A new totalsynthesis of the antitumor alkaloid, pancratistatin (1), has been accomplished from readily available starting materials. Claisen rearrangement of the racemic dihydropyranethylene 17 was employed to construct the A and C rings with the appropriate stereochemistry. In addition, the Ireland−Claisen rearrangement of the enantiomerically pure 9 followed by ring-closing metathesis provided the
Stereocontrolled Total Synthesis of Pancratistatin
作者:Sanghee Kim、Hyojin Ko、Eunkyung Kim、Deukjoon Kim
DOI:10.1021/ol0256419
日期:2002.4.1
A new total synthesis of the antitumor alkaloids, pancratistatin (1), has been accomplished from readily available staring materials. The Claisen rearrangement of dihydropyranethylene 5 was employed to construct the A and C rings. Stereo- and regiocontrolled functional group interchange, such as iodolactonization, dihydroxylations, and a cyclic sulfate elimination reaction, allows for the production
β-Silyl Styrene As a Dienophile in the Cycloaddition with 3,5-Dibromo-2-pyrone for the Total Synthesis of (±)-Pancratistatin
作者:Yong-Geun Jung、Ho-Ung Kang、Hyun-Kyu Cho、Cheon-Gyu Cho
DOI:10.1021/ol202525a
日期:2011.11.4
route to (±)-pancratistatin was devised utilizing β-silyl styrene as a dienophile in the cycloaddition with 3,5-dibromo-2-pyrone. The TMS group incorporated in the cycloadduct permitted a facile elimination process for the eventual installation of the C(1)–OH function. Subsequent transformations including Curtius rearrangement and Bischler–Napieralski reactions completed the totalsynthesis of (±)-pancratistatin