Modular Synthesis of a New Family of Tripodal Ligands, <i>all</i>-<i>cis</i>-1,2,3-Tris(diphenylphosphinomethyl)cyclopropane and Relatives
作者:Heiko Schill、Armin de Meijere、Dmitry S. Yufit
DOI:10.1021/ol070707r
日期:2007.7.1
obtained in three steps from commercially available cis-2-butene-1,4-diol (75% overall yield) and used to prepare a number of all-cis-1,2,3-trisubstituted cyclopropane derivatives. Among them, the new tripodal ligand all-cis-tris(diphenylphosphinomethyl)cyclopropane (TriCyp-PPP) has been demonstrated to furnish-with pi-allylpalladium chloride dimer-a highly active catalyst for the allylation of diethyl methylmalonate
分三步从市售的顺式-2-丁烯-1,4-二醇中制得双苄基保护的全顺式1,2,3-三(羟甲基)环丙烷(总收率75%),并用于制备许多全顺式1,2,3,3-三取代的环丙烷衍生物。其中,新的三脚架配体全顺式三(二苯基膦基甲基)环丙烷(TriCyp-PPP)已被证明可提供带有pi-alalalladium chloride的二聚体-一种高活性催化剂,用于将甲基丙二酸二乙酯烯醇酸酯与乙酸烯丙酯进行烯丙基化。