The enantioselective and diastereoselective control of 1,3-dipolarcycloadditionreactions to β-substituted cyclic enones has been developed. The 1,3-dipolarcycloaddition of phthalazinium dicyanomethanides with cyclic dienones affords chiral tetrahydropyrrolo[2,1-a]phthalazine derivatives 3 through vinylogous iminium ion activation by combining a cinchona-based primary amine C3 and a chiral camphorsulfonic
已经开发出对β-取代环烯酮的1,3-偶极环加成反应的对映选择性和非对映选择性控制。二氰基甲烷化物与环状二烯酮的 1,3-偶极环加成反应通过金鸡纳基伯胺C3和手性樟脑磺酸添加剂的插烯亚胺离子活化得到手性四氢吡咯并[2,1- a ]酞嗪衍生物3 。相反,使用较弱的 3,5-双(三氟甲基)苯甲酸添加剂,二氰基二氮杂萘鎓与 β-取代环烯酮的 1,3-偶极环加成反应生成手性六氢异吲哚并[1,2- a ]酞嗪-10(8 H )-一衍生物4通过内二烯胺活化具有出色的立体控制能力。
Regiodivergent 1,4 versus 1,6 Asymmetric Copper-Catalyzed Conjugate Addition
作者:Hélène Hénon、Marc Mauduit、Alexandre Alexakis
DOI:10.1002/anie.200803735
日期:2008.11.10
HATANAKA, YASUO;KUWAJIMA, ISAO, J. ORG. CHEM., 1986, 51, N 10, 1932-1934