Axial-Chiral Biisoquinoline<i>N</i>,<i>N</i>′-Dioxides Bearing Polar Aromatic C-H Bonds as Catalysts in Sakurai-Hosomi-Denmark Allylation
作者:Carlyn Reep、Pierpaolo Morgante、Roberto Peverati、Norito Takenaka
DOI:10.1021/acs.orglett.8b02457
日期:2018.9.21
as Lewis base catalysts are reported. Lewis bases containing the 3,5-bis(trifluoromethyl)phenyl group were found to be significantly more enantioselective for a wider range of substrates than those bearing aromatic residues that are not strongly electron-deficient in the allylation of aldehydes with allyltrichlorosilane. Also, optically pure 3,3′-dibromo-1,1′-biisoquinoline N,N′-dioxide that has not
报道了设计,合成和评价带有极性芳族CH键的路易斯-碱催化剂的轴向手性双异喹啉。发现含有3,5-双(三氟甲基)苯基的路易斯碱对于较宽范围的底物比带有醛基的电子具有更大的对映选择性,所述芳族残基在醛与烯丙基三氯硅烷的烯丙基化中不是强电子缺陷的。另外,合成了以前没有报道的光学纯的3,3'-二溴-1,1'-二异喹啉N,N'-二氧化物作为常用的催化剂前体,以促进研究。