Diastereoselective synthesis of spirocyclic isoxazolo[5,4-<i>c</i>]pyrrolo[2,1-<i>a</i>]isoquinolines <i>via</i> cascade double [3 + 2]cycloadditions
作者:Dan Liu、Jing Sun、Yu Zhang、Chao-Guo Yan
DOI:10.1039/c9ob01474h
日期:——
spiro[indoline-3,8'-isoxazolo[5,4-c]pyrrolo[2,1-a]isoquinolines] in good yields and with high diastereoselectivity. When 4-arylidenepyrazol-3-ones, 2-arylidene-1,3-indanediones and arylidenemalononitriles were employed in the reaction, the corresponding spiro[isoxazolo[5,4-c]pyrrolo[2,1-a]isoquinoline-8,4'-pyrazole], spiro[indene-2,8'-isoxazolo[5,4-c]pyrrolo[2,1-a]isoquinoline], and isoxazolo[5,4-c]pyrrolo[2,1-a]isoquinoline
N-氰基甲基异喹啉鎓氯化物与(E)-3-芳基亚吲哚啉-2-酮和(E)-N-羟基苯甲亚甲基氯的一锅碱促进的级联双[3 + 2]环加成反应提供了新型多环螺[indoline-3 ,8'-异恶唑并[5,4-c]吡咯并[2,1-a]异喹啉]具有高产率和高非对映选择性。当在反应中使用4-芳基吡唑-3-酮,2-芳基-1,3-茚满二酮和芳基丙二腈时,相应的螺[isoxazolo [5,4-c] pyrrolo [2,1-a] isoquinoline-8, 4'-吡唑],螺[茚-2,8'-异恶唑并[5,4-c]吡咯并[2,1-a]异喹啉]和异恶唑并[5,4-c]吡咯并[2,1-a还制备了高收率和高非对映选择性的]异喹啉衍生物。