Regio- and diastereoselective construction of a new set of functionalized pyrrolidine, spiropyrrolidine and spiropyrrolizidine scaffolds appended with aryl- and heteroaryl moieties via the azomethine ylide cycloadditions
作者:Vadla Rajkumar、Srinivasarao Arulananda Babu、Rayavarapu Padmavathi
DOI:10.1016/j.tet.2016.07.053
日期:2016.9
Highly regio- and diastereoselective syntheses of a new set of functionalized pyrrolidines, spiro-pyrrolidine/pyrrolizidine oxindoles, spiroacenaphthylenolyl-pyrrolidines/pyrrolizidines and spiro-1,3-indandionolyl-pyrrolidines/pyrrolizidines appended with various aryl- and heteroaryl moieties via the azomethine ylide cycloaddition reaction are reported. The Ag-catalyzed [3+2] cycloaddition of azomethine
一组新的功能化吡咯烷,螺并吡咯烷/吡咯并吡啶氧吲哚,螺并ac苯并菲咯啉基-吡咯烷/吡咯并吡啶和螺-1,3-吲哚并菲酰基-吡咯烷/吡咯并吡啶的高区域选择性和非对映选择性合成报道了环加成反应。Ag衍生自N的偶氮甲亚胺的[3 + 2]环加成反应用各种亚芳基/杂芳基亚甲基丙二酸-亚苄基亚氨基甘氨酸盐产生具有良好区域和非对映选择性的C-3,C-5-芳基/杂芳基取代的C-4,C-4-二氰基吡咯烷-2-羧酸酯支架。此外,研究了由不同的1,2-二羰基和α-氨基酸与基于吲哚/吡咯的偶极亲和剂的脱羧反应衍生的偶氮甲亚胺的[3 + 2]环加成反应。在丰富功能化的螺吡咯烷-和螺吡咯并吡啶骨架的文库的背景下,这些反应导致组装了各种螺并吡咯烷/吡咯并吡啶氧吲哚,螺并ena庚烯基-吡咯烷/吡咯并吡啶和螺-1,3-茚满二酮基-吡啶并吡啶在螺吡咯烷/吡咯烷环的C-3位的吲哚基和吡咯基部分。由甲亚胺叶立德环加成反应获得的图8