Highly regioselective C4-hydrazinylation of 2,4-dichloroquinolines: expedient synthesis of aminoquinoline substituted pyrrolidin-2,5-diones via hydrazinylquinolines
A new class of hydrazinylquinoline regio-isomers has been synthesized through SNAr reaction of 2,4-dichloroquinolines with hydrazine hydrate. The reaction stops at the mono-substitution product with high regioselectivity at the C4 rather than C2 position of dichloroquinolines. The hydrazinylquinolines were subsequently converted into aminoquinoline substituted pyrrolidin-2,5-diones in the presence
通过2,4-二氯喹啉与水合肼的S N Ar反应合成了一类新的肼基喹啉区域异构体。反应在二氯喹啉的C 4位置而不是C 2位置处以具有高区域选择性的单取代产物终止。随后在伊顿试剂的存在下将肼基喹啉转化为氨基喹啉取代的吡咯烷-2,5-二酮。