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
A double heteroatom Mitsunobu coupling with amino hydroxybenzoic acids on solid phase: a novel application of the Mitsunobu reaction to form dendron building blocks
作者:Tzachi Shalit、Amnon Albeck、Gary Gellerman
DOI:10.1016/j.tetlet.2010.08.105
日期:2010.11
A new highly efficient double heteroatom Mitsunobu coupling with amino hydroxybenzoic acids on solid phase is described. The synthetic routes reported in this work are general and applicable for the preparation of diverse building blocks, controlling protection, arm length, chirality, and peripheral functional groups. These novel units can form unusual dendritic architectures, which could be incorporated
Formamides as Lewis Base Catalysts in S<sub>N</sub>Reactions-Efficient Transformation of Alcohols into Chlorides, Amines, and Ethers
作者:Peter H. Huy、Sebastian Motsch、Sarah M. Kappler
DOI:10.1002/anie.201604921
日期:2016.8.16
and waste‐balance (E‐factor down to 2). Chiral substrates are converted with excellent levels of stereochemical inversion (99 %→≥95 % ee). In a practical one‐pot procedure, the primary formed chlorides can be further transformed into amines, azides, ethers, sulfides, and nitriles. The value of the method was demonstrated in straightforward syntheses of the drugs rac‐Clopidogrel and S‐Fendiline.
[EN] METHOD OF CONVERTING ALCOHOL TO HALIDE<br/>[FR] PROCÉDÉ DE CONVERSION D'UN ALCOOL EN HALOGÉNURE
申请人:UNIV SAARLAND
公开号:WO2016202894A1
公开(公告)日:2016-12-22
The present invention relates to a method of converting an alcohol into a corresponding halide. This method comprises reacting the alcohol with an optionally substituted aromatic carboxylic acid halide in presence of an N-substituted formamide to replace a hydroxyl group of the alcohol by a halogen atom. The present invention also relates to a method of converting an alcohol into a corresponding substitution product. The second method comprises: (a) performing the method of the invention of converting an alcohol into the corresponding halide; and (b) reacting the corresponding halide with a nucleophile to convert the halide into the nucleophilic substitution product.