Convenient synthesis of tricyclic N(1)–C(2)-fused oxazino-indolones <i>via</i> [Au(<scp>i</scp>)] catalyzed hydrocarboxylation of allenes
作者:Riccardo Pedrazzani、Emanuele Pinosa、Giulio Bertuzzi、Magda Monari、Samuel Lauzon、Thierry Ollevier、Marco Bandini
DOI:10.1039/d2cc02303b
日期:——
A new [Au(I)] catalyzed intramolecular hydrocarboxylation of allenes is presented as a valuable synthetic route to oxazino-indolones. The use of 3,5-(CF3)2–C6H3–ImPyAuSbF6 as the optimal catalyst (5 mol%) was necessary to guarantee (i) wide tolerance of functional groups, (ii) mild reaction conditions (r.t., 16 h), and (iii) high yields (up to 90%). Preliminary attempts towards an enantioselective
一种新的[Au( I )]催化丙二烯分子内加氢羧化被提出作为恶嗪-吲哚酮的一种有价值的合成途径。必须使用 3,5-(CF 3 ) 2 –C 6 H 3 –ImPyAuSbF 6作为最佳催化剂 (5 mol%),以保证 (i) 官能团的广泛耐受性,(ii) 温和的反应条件 (rt , 16 h), 和 (iii) 高产率 (高达 90%)。还通过手性C 1 -对称 ImPyAuCl 复合物的新家族记录了对映选择性版本 (81 : 19 er) 的初步尝试。