Epimerization-Free Block Synthesis of Peptides from Thioacids and Amines with the Sanger and Mukaiyama Reagents
作者:David Crich、Indrajeet Sharma
DOI:10.1002/anie.200805782
日期:2009.3.16
reaction of C‐terminal thioacids derived from protected amino acids and peptides with the Sanger reagent and other electron‐deficient aryl halides in the presence of a free amine immediately form a peptide bond with the amine. This essentially epimerization‐free method was used for the 4+4 block synthesis of a hindered octapeptide (see scheme; Boc, Pbf, and Trt are protectinggroups).
T3P (propylphosphonic anhydride) mediated conversion of Nα-protected amino/peptide acids into thioacids
作者:Chilakapati Madhu、Basavaprabhu、T.M. Vishwanatha、Vommina V. Sureshbabu
DOI:10.1016/j.tetlet.2012.01.027
日期:2012.3
protocol, which makes use of T3P as an acidactivator for the synthesis of Nα-protectedamino/peptide thioacids from corresponding acids in the presence of finely ground Na2S as hydrosulfide ion donor is described. The protocol employed significantly increases the overall efficiency as the yield, reaction duration and purity of even sterically hindered aminoacids.
AMINOACYL PRODRUG DERIVATIVES AND MEDICAMENTS FOR THE TREATMENT OF THROMBOEMBOLITIC DISORDERS
申请人:Lerchen Hans-Georg
公开号:US20120088761A1
公开(公告)日:2012-04-12
The present application relates to prodrug derivatives of 5-chloro-N-((5S)-2-oxo-3-[4-(3-oxomorpholin-4-yl)phenyl]-1,3-oxazolidin-5-yl}methyl)thiophene-2-carboxamide, processes for their preparation, their use for the treatment and/or prophylaxis of diseases, and their use for the manufacture of medicaments for the treatment and/or prophylaxis of diseases, especially of thromboembolic disorders.
Protected amino/peptide thioacids have been synthesized in pure form in excellent yields and with retention of chirality by using protected aminoacyl- and peptidoylbenzotriazoles as active intermediates.