Synthesis of Propargylic Ethers by Gold-Mediated Reaction of Terminal Alkynes with Acetals
作者:Miyu Furuta、Kyoko Sugiyama、Minami Yamaguchi、Hirofumi Ueda、Hidetoshi Tokuyama
DOI:10.1248/cpb.c19-00322
日期:2019.8.1
alkynes to acetals was investigated. Extensive optimization of the reaction conditions revealed that thermally stable cationic gold catalysts bearing bulky ligands such as 1,3-bis(2,6-diisopropylphenyl)imidazol-2-ylidene 3-1H-benzo[d][1,2,3]triazolyl gold trifluoromethanesulfonate (IPrAu(BTZ-H)OTf) were particularly suitable for the reaction. Additionally, significant solvent effects were observed. Ether
研究了金催化将各种末端炔烃引入缩醛。反应条件的广泛优化表明,具有大体积配体的热稳定阳离子金催化剂,例如1,3-双(2,6-二异丙基苯基)咪唑-2-亚烷基3-1H-苯并[d] [1,2,3]三唑基三氟甲磺酸金(IPrAu(BTZ-H)OTf)特别适合该反应。另外,观察到明显的溶剂作用。醚溶剂如四氢呋喃(THF),环戊基甲基醚(CPME)和1,4-二恶烷对反应有效。对底物和炔烃范围的研究表明,各种炔烃和缩醛可用于提供各种炔丙基醚。