Reductive heterocyclizations via indium–iodine-promoted conversion of 2-nitroaryl imines or 2-nitroarenes to 2,3-diaryl-substituted indazoles
作者:Gil Hwan Ahn、Jung June Lee、Young Moo Jun、Byung Min Lee、Byeong Hyo Kim
DOI:10.1039/b707240f
日期:——
N-(2-nitrobenzylidene)anilines produced mixtures of 2,1-benzisoxazoles and 3-anilino-2-aryl-2H-indazoles in the presence of indium and iodine in MeOH, N-(2-nitrobenzylidene)anilines were transformed into 3-anilino-2-aryl-2H-indazoles as the predominant major product through the change of the solvent from protic MeOH to aprotic THF. In an indium-mediated one-pot reductive reaction, 2-benzaldehydes and anilines in THF
当N-(2-硝基苄叉基)苯胺在甲醇中存在铟和碘的情况下生成2,1-苯并恶唑和3-苯胺基-2-芳基-2H-吲唑的混合物时,N-(2-硝基苄叉基)苯胺被转化为通过将溶剂从质子型MeOH变为质子型THF,将3-苯胺基-2-芳基-2H-吲唑类化合物作为主要的主要产物。在铟介导的一锅还原反应中,THF中的2-苯甲醛和苯胺也成功转化为相应的吲唑。