Synthesis and Complete Stereochemical Assignment of Psymberin/Irciniastatin A
作者:Xin Jiang、Jorge García-Fortanet、Jef K. De Brabander
DOI:10.1021/ja0537068
日期:2005.8.1
We describe a concise and flexible synthetic avenue for the preparation of compounds with structures relevant to those proposed for the novel marine-derived differential cytotoxins psymberin and irciniastatin A. Our efforts led to their complete stereochemical assignment and the notion that psymberin and irciniastatin A are identical compounds. Our total synthesis features an interesting termini-differentiating
我们描述了一种简洁灵活的合成途径,用于制备结构与新型海洋衍生差异细胞毒素 psymberin 和 irciniastatin A 相关的化合物。我们的努力导致了它们的完整立体化学分配以及 psymberin 和 irciniastatin A 相同的概念化合物。我们的全合成具有从 C2 对称双烯烃前体获得的二醛的有趣的末端差异化乳醇化、差向异构腈的温和铂催化水解、制备灵敏的亚胺酸甲酯的新方案和一锅法转化这些亚胺酯转化为 N-酰基胺。从片段 5-7 开始(每个片段准备 7-8 个步骤,
Elongation of 1,3-Polyols via Iterative Catalyst-Directed Carbonyl Allylation from the Alcohol Oxidation Level
作者:Abbas Hassan、Yu Lu、Michael J. Krische
DOI:10.1021/ol901136w
日期:2009.7.16
Iterative enantioselectivecarbonylallylationfrom the alcoholoxidationlevel under the conditions of iridium catalyzed transfer hydrogenation enables chain elongation of 1,3-polyols. High levels of catalyst-directed enantioselectivity and diastereoselectivity are observed.
Synthesis and complete stereochemical assignment of psymberin/irciniastatin for use as antitumor compounds
申请人:Brabander De Jef
公开号:US20070015821A1
公开(公告)日:2007-01-18
The invention relates to the synthesis and complete stereochemical assignments of cytotoxic compounds such as compound 28-a and its stereoisomers:
The invention further provides processes for making the compounds, their synthetic intermediates, and for methods of using the compounds and their pharmaceutical compositions for the treatment of neoplastic diseases.
Synthesis of Psymberin Analogues: Probing a Functional Correlation with the Pederin/Mycalamide Family of Natural Products
作者:Xin Jiang、Noelle Williams、Jef K. De Brabander
DOI:10.1021/ol062656o
日期:2007.1.1
In this letter we describe an efficient synthesis of "psympederin", a hybrid between the novel antitumor naturalproduct psymberin and the blister beetle toxin pederin. Evaluation of antiproliferative activity reveals that the dihydroisocoumarin fragment is important for psymberin toxicity and the cyclic pederate fragment is important for pederin/mycalamide toxicity. On the basis of preliminary results