Synthesis of Diyne Substituted 2-Hydroxy Acids, Esters, and Amides
作者:Florian H. M. Graichen、Andrew C. Warden、Stella Kyi、Michael S. O'Shea
DOI:10.1071/ch09639
日期:——
diyne substituted 2-hydroxy acids and derivatives have been prepared and characterized. Alkylation of butane-2,3-diacetal protected glycolic acid with haloalkyl substituted diyne compounds gave the corresponding diacetal protected diyne substituted 2-hydroxy acids. Diacetal deprotection through acid mediated hydrolysis, transesterification, or aminolysis afforded the 2-hydroxy-diyne acid, ester, or amide
A convenient route to unsymmetrical conjugated diynes
作者:Mouâd Alami、Fabiola Ferri
DOI:10.1016/0040-4039(96)00414-5
日期:1996.4
Various unsymmetricalconjugated diynes can be prepared in good to excellent isolated yields by copper catalyzed coupling reaction of terminal alkynes with 1-iodo alkynes in pyrrolidine. In the case of 1-bromo alkynes, the presence of a catalytic amount of PdCl2(PPh3)2 improved the yield of coupling products.