Chiral 5-(diphenylphosphanyl)-1,2,3,4-tetrahydroacridines: new N,P-ligands for asymmetric catalysis
作者:Giorgio Chelucci、Gianmauro Orrù
DOI:10.1016/j.tetlet.2005.03.113
日期:2005.5
Three chiral 5-(diphenylphosphanyl)-1,2,3,4-tetrahydroacridines, as first representative examples of a new class of chiral N,P-ligands were prepared from (+)-nopinone, (+)-camphor and 5α-androst-2-en-17-one. These ligands have been assessed in the enantioselective palladium-catalysed allylic substitution of 1,3-diphenylprop-2-enyl acetate with dimethyl malonate. Enantioselectivity up to 74% has been
从(+)-去甲酮,(+)-樟脑和5α-制备了三个手性5-(二苯基膦基)-1,2,3,4-四氢ac啶,作为新型手性N,P-配体的第一个代表性实例。 androst-2-en-17-one。这些配体已经被丙二酸二甲酯对映体选择性催化钯催化的1,3-二苯基丙-2-烯基乙酸酯的烯丙基取代。已获得高达74%的对映选择性。