Amino Acid and Peptide Synthesis and Functionalization by the Reaction of Thioacids with 2,4-Dinitrobenzenesulfonamides
摘要:
[GRAPHICS]Readily prepared amino thioacids react at room temperature in DMF in the presence of cesium carbonate with 2,4-dinitrobenzenesulfonamides to give amides. When the sulfonamide is derived from an amino acid the method results in peptide bond formation, whereas the use of carbohydrate derived sulfonamides gives neoglycoconjugates.
Triblock Peptide and Peptide Thioester Synthesis With Reactivity-Differentiated Sulfonamides and Peptidyl Thioacids
作者:David Crich、Indrajeet Sharma
DOI:10.1002/anie.200903050
日期:2009.9.28
One after the other: Triblock peptide synthesis was achieved at ambient temperature by sequential reaction of sulfonamide‐protected peptidyl thioacids first with highly reactive 2,4‐dinitrobenzenesulfonamides and second with more moderately reactive sulfonamides to produce the oligopeptides in good yields. The method is compatible with C‐terminal thioesters and thus presents a new approach for native
一个接一个:三嵌段肽的合成是在环境温度下通过磺酰胺保护的肽基硫酸首先与高反应性的 2,4-二硝基苯磺酰胺,然后与反应性中等的磺酰胺顺序反应来实现的,从而以良好的收率生产寡肽。该方法与 C 端硫酯兼容,因此为天然化学连接策略提供了一种新方法。
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.
S<sub>N</sub>2-Type Nucleophilic Opening of β-Thiolactones (Thietan-2-ones) as a Source of Thioacids for Coupling Reactions
作者:David Crich、Kasinath Sana
DOI:10.1021/jo9001728
日期:2009.5.1
3-arylthiopropionamides carrying various substituents in the 2-position. Alternatively, the trapping combination of an electron deficient aryl halide and an amine may be replaced by a 2,4-dinitrobenzenesulfonamide, resulting in the formation of the same products overall with the incorporation of the latent amine in the sulfonamide into the final amide product. In another embodiment, the thiocarboxylate intermediate
2-Nitro- and 2,4-Dinitrobenzenesulfonamides as Protecting Groups for Primary Amines
作者:Ken-ichi Nihei、Massuo J. Kato、Tetsuo Yamane、Mario S. Palma、Katsuhiro Konno
DOI:10.1055/s-2001-15158
日期:——
Procedures for the deprotection of the 2-nitro- and 2,4-dinitrobenzenesulfonamides to give the corresponding primary amines were developed. The 2-Nitrobenzenesulfonyl group was effectively removed by HSCH2CH2OH/DBU or PhSH/Cs2CO3 in DMF under mild conditions to give the corresponding primary amines in high to excellent yield. For removal of the 2,4-dinitrobenzenesulfonyl group, the use of thiol alone (HSCH2CH2OH or PhSH) was quite effective. Selective deprotection of 2,4-dinitrobenzenesulfonamide in the presence of 2-nitrobenzenesulfonamide has also been achieved.
Solid phase heterocyclic synthesis via ring closing metathesis: Traceless linking and cyclative cleavage through a carbon-carbon double bond
作者:Anthony D. Piscopio、John F. Miller、Kevin Koch
DOI:10.1016/s0040-4039(97)01769-3
日期:1997.10
Ring closing metathesis was utilized to affect cyclative cleavage of resin-bound α,ω dienes in the solid phase synthesis of dihydropyarans, pipecolinic acid derivatives and Freidinger lactams.