120693-81-4Relevant articles and documents
METHOD FOR PRODUCING THIOLANE SKELETON-TYPE GLYCOCONJUGATE, AND THIOLANE SKELETON-TYPE GLYCOCONJUGATE
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Paragraph 0245-0247, (2016/10/08)
PROBLEM TO BE SOLVED: To provide a simplified method for producing a synthetic intermediate of a thionucleoside in high yield under a moderate condition by a reaction to form a thiolane ring. SOLUTION: The present invention relates to a method for produci
Diastereoselective concise syntheses of the polyhydroxylated alkaloids DMDP and DAB
Bouillon, Marc E.,Pyne, Stephen G.
, p. 475 - 478 (2014/01/06)
A diastereoselective concise synthesis of the iminosugars DMDP and DAB is presented starting from l-xylose and affording the two alkaloids in good yields of 35% and 22% over seven and eight steps, respectively. The Petasis borono-Mannich reaction of 3,5-di-O-benzyl-l-xylofuranose with benzylamine and (E)-styrylboronic acid served as the nitrogen-introducing key step furnishing the new C-N bond in an entirely diastereoselective manner. A chemo- and regioselective O-mesylation followed by an intramolecular SN2- cyclisation allowed the formation of the pyrrolidine ring. Ozonolysis of the styryl double bond and subsequent reduction to form the C-5 hydroxymethyl substituent followed by hydrogenolysis of the benzyl protecting groups concluded the DMDP synthesis. Furthermore, an unexpected fragmentation process during the ozonolysis reaction also gave access to the C-5 decarbinolated DMDP derivative DAB.
EFFICIENT SYNTHESIS AND ANTITUMOR ACTIVITY OF AN ENANTIOMERIC PAIR OF THE SESBANIMIDE AB-RING SYSTEMS
Matsuda, Fuyuhiko,Kawasaki, Motojio,Terashima, Shiro
, p. 4639 - 4642 (2007/10/02)
An enantiomeric pair of the fully unprotected AB-ring systems of sesbanimide A (1), a potent antitumor alkaloid, was efficiently synthesized from readily available D- and L-xylose.Examination on their in vitro antitumor activity clearly disclosed that the AB-ring system only made a small contribution to the notable cytotoxicity of 1.