Hydriodic Acid-Mediated Cyclization of α-Substituted Secondary 2-Ethenylbenzamides: Synthesis of 2-Substituted 2,3-Dihydro-3,3-dimethyl-1H-isoindol-1-ones and 3,3-Disubstituted (E)-1-(Arylimino)-1,3-dihydroisobenzofurans
作者:Kazuhiro Kobayashi、Seiki Fujita、Daisuke Nakai、Shogo Fukumoto、Shuhei Fukamachi、Hisatoshi Konishi
DOI:10.1002/hlca.201000172
日期:——
for the preparation of 2‐substituted 2,3‐dihydro‐3,3‐dimethyl‐1H‐isoindol‐1‐ones 3 and 3,3‐disubstituted (E)‐1‐(arylimino)‐1,3‐dihydroisobenzofurans 6 has been developed. Thus, treatment of N‐alkyl(or aryl)‐2‐(1‐methylethen‐1‐yl)benzamides 2 with concentrated hydriodic acid (HI) in MeCN at room temperature afforded 3. Similar treatment of N‐aryl‐2‐(1‐phenylethen‐1‐yl)benzamide 5 with concentrated HI
一种新的简便方法,可制备2-取代的2,3-二氢-3,3-二甲基-1 H-异吲哚-1-酮3和3,3-二取代(E)-1(芳基)-1已经开发了3-3-二氢异苯并呋喃6。因此,治疗的ñ -烷基(或芳基)-2-(1- methylethen -1-基)苯甲酰胺2与在MeCN浓氢碘酸(HI)在得到室温下3。在0°下用浓HI对N-芳基-2-(1-苯基乙-1-基)苯甲酰胺5进行类似处理,得到6。