Synthesis of Selenoxo Peptides and Oligoselenoxo Peptides Employing LiAlHSeH
摘要:
Synthesis of selenoxo peptides by the treatment of N-a-protected peptide esters with a combination of PCl5 and LiAlHSeH is delineated. The method is simple, high-yielding, and free from racemization. Thus obtained selenoxo peptides are used as unit; for N-terminal chain extension through N-alpha-deprotection/coupling to yield peptide selenoxo peptide hybrids. Multiple selenation is demonstrated by conversion of two peptide bonds of tripeptides into selenoxo peptide bonds. Amino acid derived arylamides are also converted into aryl selenoamides. C6H5-CSeNH-Val-OMe 8f is obtained as single crystal, and its structure was determined through X-ray diffraction study.
Sudarshan, Naremaddepalli S.; Suresh Babu, Vommina V., Indian Journal of Chemistry - Section B Organic and Medicinal Chemistry, 2005, vol. 44, # 7, p. 1509 - 1511
作者:Sudarshan, Naremaddepalli S.、Suresh Babu, Vommina V.
DOI:——
日期:——
A New Oxyma Derivative for Nonracemizable Amide-Forming Reactions in Water
作者:Qinghui Wang、Yong Wang、Michio Kurosu
DOI:10.1021/ol3013556
日期:2012.7.6
An Oxyma derivative, (2,2-dimethyl-1,3-dioxolan-4-yl)methyl 2-cyano-2-(hydroxyimino)acetate (2), displayed remarkable physicochemical properties as a peptide-coupling additive for peptide-forming reactions in water. Short peptides to oligopeptides could be synthesized by using 2, EDCI, and NaHCO3 in water without measurable racemization. Significantly, a simple basic and acidic aqueous workup procedure can remove all reagents utilized in the reactions to afford only coupling products in consistently excellent yields.
CARPINO, LOUIS A., J. ORG. CHEM., 53,(1988) N 4, 875-878