Pentacyclic Furanosteroids: The Synthesis of Potential Kinase Inhibitors Related to Viridin and Wortmannolone

被引:21
|
作者
Lang, Yunhui [1 ]
Souza, Fabio E. S. [1 ]
Xu, Xinshe [1 ]
Taylor, Nicholas J. [1 ]
Assoud, Abdeljalil [1 ]
Rodrigo, Russell [1 ]
机构
[1] Univ Waterloo, Dept Chem, Waterloo, ON N2L 3G1, Canada
来源
JOURNAL OF ORGANIC CHEMISTRY | 2009年 / 74卷 / 15期
基金
加拿大自然科学与工程研究理事会;
关键词
DIELS-ALDER REACTIONS; PHOSPHOINOSITIDE; 3-KINASE; RING-SYSTEM; CYCLOADDITIONS; ALKALOIDS; CHEMISTRY;
D O I
10.1021/jo900922q
中图分类号
O62 [有机化学];
学科分类号
070303 ; 081704 ;
摘要
A regiocontrolled intermolecular Diels-Alder reaction of all o-benzoquinone followed by all intramolecular nitrile oxide cyclization is employed to prepare the BCD fragment of viridin. The AE segment is attached to it by means of an intramolecular Diels-Alder reaction of an o-benzoquinone monoketal generated in situ from tricycle 15 and 5-trimethylsilyl-2E,4E-pentadienol 20. The silyl substituent at C-1 of the pentacyclic product directs the dihydroxylation of the C-2-C-3 double bond to its beta-face. Various transformations of the 1-trimethylsilyi-2 beta,3 beta-dihydroxy pentacycle into several others with oxygen substituents in ring A are described. One of these products 40 possesses the same structure and relative stereochemistry in rings A, B, and E as that of the natural product wortmannolone 3.
引用
收藏
页码:5429 / 5439
页数:11
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