Diversity-oriented synthesis of cyclic acyldepsipeptides leads to the discovery of a potent antibacterial agent
作者:Aaron M. Socha、Nicholas Y. Tan、Kerry L. LaPlante、Jason K. Sello
DOI:10.1016/j.bmc.2010.08.032
日期:2010.10.15
structure, featuring the Joullié-Ugi three-component reaction, was developed. This multicomponent reaction and a related multicomponent reaction, the Ugi four-component reaction, were used to prepare analogs that were designed using the principles of conformational analysis. These cyclic acyldepsipeptides were tested for their activity against drug-resistant, clinical isolates of Staphylococci and Enterococci
Polypeptides. Part XXIII. The synthesis of peptides of α-benzylphenylalanine by unconventional methods, with a note on magnetic non-equivalence in derivatives of α-benzylphenylalanine
作者:H. L. Maia、B. Ridge、H. N. Rydon
DOI:10.1039/p19730000098
日期:——
α-benzylphenylalanine peptides, but is limited in its application owing to the complete racemisation which attends the conversion of L-amino-acid esters into the isocyanides. The oxazolinone method is useful for the synthesis of peptides of α-benzylphenylalanine by the fragment condensation strategy employing small peptides containing C-terminal α-benzylphenylalanine residues, but breaks down with larger peptides.
A three-component radical coupling reaction of aryl alkenes or 1,3-enynes with tert-butyl hydroperoxide and formamides for the efficient synthesis of β-peroxy amides.
Formamide Synthesis through Borinic Acid Catalysed Transamidation under Mild Conditions
作者:Tharwat Mohy El Dine、David Evans、Jacques Rouden、Jérôme Blanchet
DOI:10.1002/chem.201600234
日期:2016.4.18
A highly efficient and mild transamidation of amides with amines co‐catalysed by borinic acid and acetic acid has been reported. A wide range of functionalised formamides was synthesized in excellent yields, including important chiral α‐amino acid derivatives, with minor racemisation being observed. Experiments suggested that the reaction rely on a cooperative catalysis involving an enhanced boron‐derived
Effective Formylation of Amines with Carbon Dioxide and Diphenylsilane Catalyzed by Chelating bis(<i>tz</i>NHC) Rhodium Complexes
作者:Thanh V. Q. Nguyen、Woo-Jin Yoo、Shū Kobayashi
DOI:10.1002/anie.201504072
日期:2015.8.3
(NHC=N‐heterocyclic carbene) have been synthesized and applied to the reductive formylation of amines using CO2 and Ph2SiH2. A rhodium‐based bis(tzNHC) complex (tz=1,2,3‐triazol‐5‐ylidene) was identified to be highly effective at a low catalyst loading and ambient temperature, and a wide substrate scope, includingamines with reducible functional groups, were compatible.