Nickel-Catalyzed Regio- and Enantioselective Annulation Reactions of 1,2,3,4-Benzothiatriazine-1,1(2H)-dioxides with Allenes
作者:Tomoya Miura、Motoshi Yamauchi、Akira Kosaka、Masahiro Murakami
DOI:10.1002/anie.201001918
日期:——
4‐Benzothiatriazine‐1,1(2H)‐dioxides reacted with allenes in the presence of a nickel(0)/(R)‐quinap complex to produce a variety of substituted 3,4‐dihydro‐1,2‐benzothiazine‐1,1(2H)‐dioxides in a regio‐ and enantioselective fashion. An intermediate nickelacycle was generated through denitrogenative activation of the triazo moiety which allowed the intermolecular incorporation of an allene group. quinap=1‐
在镍(0)/(R)-喹啉络合物存在下,N 2的挤出:1,2,3,4-苯并噻吩并三嗪-1,1 (2 H)-二氧化物与艾伦反应生成多种取代的3 ,4-二氢-1,2-苯并噻嗪-1,1(2 H)-二氧化物呈区域和对映选择性。通过三偶氮基团的脱氮活化产生了中间的镍环,其允许分子间结合丙二烯基。quinap = 1-(2-二苯基膦基-1-萘基)异喹啉。