Multicomponent coupling and glycopeptide synthesis with cyclic thioanhydrides
申请人:Crich David
公开号:US20090163697A1
公开(公告)日:2009-06-25
Disclosed is a method of coupling an amino or hydroxyl compound with the amino portion of a sulfonamide via condensation with a cyclic thioanhydride. The reaction of cyclic thioanhydrides with amines affords amides functionalized with thioacids, which can be trapped in situ with preferably electron deficient arylsulfonamides. In this manner the cyclic thioanhydride serves as a linchpin in a three component coupling sequence.
Cyclic Thioanhydrides: Linchpins for Multicomponent Coupling Reactions Based on the Reaction of Thioacids with Electron-Deficient Sulfonamides and Azides
作者:David Crich、Albert A. Bowers
DOI:10.1021/ol702570x
日期:2007.12.1
electron-deficient azides or, preferably, 2,4-dinitrobenzenesulfonamides. In this manner the cyclic thioanhydride serves as a linchpin in a three-componentcouplingsequence. The use of thiomaleic anhydride and a bifunctional nucleophile extends the process to heterocycle synthesis, while a cyclic thioanhydride prepared from aspartic acid directly provides N-functionalized asparagine derivatives.
One-Pot Syntheses of Dissymmetric Diamides Based on the Chemistry of Cyclic Monothioanhydrides. Scope and Limitations and Application to the Synthesis of Glycodipeptides
作者:David Crich、Kaname Sasaki、Md Yeajur Rahaman、Albert A. Bowers
DOI:10.1021/jo900532e
日期:2009.5.15
protection of alcohols in the various reaction components. Reaction of N-benzyloxycarbonyl-l-aspartic monothioanhydride with unprotectedglycosyl amines, followed by capture of the thioacid intermediate with N-sulfonyl aminoacid derivatives results in a three-component convergent synthesis of glycosylated peptides.