A novel asymmetric organocatalytic Michael–aldol–dehydration domino reaction for the construction of spirocyclic benzofuranones
作者:Liang-Wen Qi、Liang-Liang Wang、Lin Peng、Li-Na Jia、Fang Tian、Xiao-Ying Xu、Li-Xin Wang
DOI:10.1016/j.tet.2013.08.030
日期:2013.11
Organocatalytic Michael–aldol–dehydration domino reaction of 3-(1-hydroxyethylidene)benzofuran-2(3H)-ones and enones catalyzed by Cinchona-based primary amine has been developed. The desired chiral spirocyclicbenzofuranones were obtained in excellent stereoselectivities (dr>20:1 and up to 96% ee) and moderate to excellent yields (up to 98%).
3-(1-羟基)的有机催化迈克尔羟醛脱水多米诺反应苯并呋喃-2(3 H ^) -酮,并通过基于金鸡纳伯胺催化的烯酮已经研制成功。在立体选择性优良,得到所需的手性螺环苯并呋喃酮(DR> 20:1和高达96%ee)和中等至良好的产率(高达98%)。
Preparation of 3-acetylbenzofuran-2(3H)-ones and 3-acetylnaphthofuran-2(3H)-ones via intramolecular rhodium carbenoid insertion
作者:Michael Hrytsak、Tony Durst
DOI:10.1039/c39870001150
日期:——
Rhodium(II) acetate catalysed decomposition of aryl 2-diazobutyrates and naphthyl 2-diazobutyrates results in the formation of 3-acetylbenzofuran-2(3H)-ones and 3-acetylnaphthofuran-2(3H)-ones respectively.