Efficient Domino Process Based on the Catalytic Generation of Non-Metalated, Conjugated Acetylides in the Presence of Aldehydes or Activated Ketones
作者:David Tejedor、Fernando García-Tellado、José Juan Marrero-Tellado、Pedro de Armas
DOI:10.1002/chem.200204579
日期:2003.7.7
acetylides are used to generate enol-protected functionalized propargylic alcohols 1, 1,3-dioxolane compounds 2, or 3,4,5-trisubstituted 4,5-dihydrofurans 4 through serial multibond-forming processes. The method calls for a nucleophile (a tertiary amine or phosphine) as a chemical activator, a conjugated terminal acetylene as the acetylide source, and an aldehyde or activated ketone as the electrophilic
据报道,非金属化的共轭乙炔化物极其温和高效地催化生成。这些乙炔化物通过连续的多键形成方法用于生成烯醇保护的官能化炔丙醇1、1,3-二氧戊环化合物2或3,4,5-三取代的4,5-二氢呋喃4。该方法要求使用亲核试剂(叔胺或膦)作为化学活化剂,使用共轭末端乙炔作为乙炔化物来源,并使用醛或活化酮作为亲电子试剂。该过程的化学结果取决于亲核试剂,温度,化学计量和溶剂的性质,它可以有选择地通过的实验条件的适当选择来定制。