Pinacol Cross Coupling of 2-[N-(Alkoxycarbonyl)amino] Aldehydes and Aliphatic Aldehydes by [V2Cl3(THF)6]2[Zn2Cl6]. Synthesis of syn,syn-3-[N-(Alkoxycarbonyl)amino] 1,2-Diols
作者:Andrei W. Konradi、Scott J. Kemp、Steven F. Pedersen
DOI:10.1021/ja00083a017
日期:1994.2
Slow addition of 2-[N-(alkoxycarbonyl)amino] aldehydes to mixtures of [V 2 Cl 3 (THF) 6 ] 2 [Zn 2 Cl 6 ] and aliphaticaldehydes gave syn,syn-3-[N-(alkoxycarbonyl)amino] 1,2-diols in good yield and high enantiomeric purity (>99:1). The alkyl group of the N-alkoxycarbonyl was shown to influence the yield: Me >allyl>Bn>t-Bu. Only the syn,syn diastereomer was observed (>20:1), except with N-Cbz-alaninal
Synthesis of Hybrid Peptidomimetics and Neoglycoconjugates Employing Click Protocol: Dual Utility of Poc-Group for Inserting Carbamate-Triazole Units into Peptide Backbone
作者:Hosahalli P. Hemantha、Ravi S. Lamani、Vommina V. Sureshbabu
DOI:10.1007/s10989-010-9228-6
日期:2010.12
Synthesis of new types of peptidomimetics and glycosylated amino acids possessing 1,2,3-triazole and carbamate moieties is described. Poc-protected amino acid esters/1-amino sugars were subjected to Cu(I) catalyzed [2+3]cycloaddition with desired azides under click protocol to obtain novel peptide and carbohydrate mimetics. The reaction is rapid, efficient and all the products are isolated in good yield and excellent purity.
One-step transformation of α-amino acids to α-amino aldehydes effected by electrochemical oxidation of Ph3P
作者:Hatsuo Maeda、Toshihide Maki、Hidenobu Ohmori
DOI:10.1016/s0040-4039(00)91619-8
日期:1992.3
The electrolysis of triphenylphosphine and L-alpha-amino acids in one compartment cell under a nitrogen atmosphere at -30-degrees-C gave L-alpha-amino aldehydes in good yields with no or little racemization when triphenylphosphonium perchlorate was used as a supporting electrolyte.
Pinacol homocoupling of (S)-2-[N-(benzyloxycarbonyl)amino] aldehydes by [V2Cl3(THF)6]2[Zn2Cl6]. Synthesis of C2-symmetric (1S,2R,3R,4S)-1,4-diamino 2,3-diols
作者:Andrei W. Konradi、Steven F. Pedersen
DOI:10.1021/jo00027a009
日期:1992.1
Six (S)-2-[N-(benzyloxycarbonyl)amino] aldehydes 3a-f were homocoupled by [V2Cl3(THF)6]2[Zn2Cl6] (1) to give C2-symmetric (1S,2R,3R,4S)-1,4-bis[N-(benzyloxycarbonyl)amino] 2,3-diols 4a-f in good yield. High-yield conversions of the diols to bisoxazolidinones (sodium hydride, tetrahydrofuran) and to the deprotected (1S,2R,3R,4S)-1,4-diamino 2,3-diol dihydrochloride salts (10% Pd/C, formic acid, HCl in ether) were performed.
Synthesis of 8-aminoadenosine 5′-(aminoalkyl phosphates), analogues of aminoacyl adenylates
A short and efficient route for the synthesis of aminoalkyl 8-aminoadenylates, potential aminoacyl-tRNA synthetase inhibitors, is presented. Aminoalkyl 8-aminoadenylates were synthesized using a 5'-H-phosphonate strategy involving minimal protecting group manipulations and a sing-le final deprotection step. (c) 2005 Elsevier Ltd. All rights reserved.