Cobalt(I) Catalysis in the Diastereoselective Two-Step Synthesis of Tricyclic Systems
作者:Gerhard Hilt、Florian Erver、Klaus Harms
DOI:10.1055/s-0030-1258433
日期:2011.3
The diastereoselective two-step synthesis of heterotricyclic systems is accomplished by regioselective cobalt-catalysed [4+2]- and [4+2+2]-cycloaddition reactions generating cyclohexa-1,4-diene and cycloocta-1,3,6-triene derivatives, and a hetero-Diels-Alder reaction. Thus, a set of selected cyclohexadienes and cyclooctatrienes were reacted with cyclic 1,3-diones and formaldehyde in a Knoevenagel-hetero-Diels-Alder
异三环系统的非对映选择性两步合成是通过区域选择性钴催化的[4 + 2]-和[4 + 2 + 2]-环加成反应生成的,生成环己-1,4-二烯和环辛-1,3,6-三烯衍生物和杂Diels-Alder反应。因此,在Knoevenagel-杂-Diels-Alder多组分反应中,使一组选择的环己二烯和环辛烯与环状1,3-二酮和甲醛反应以产生多种三环产物。 炔烃-催化-钴-环加成-二烯-多组分反应-杂Diels-Alder反应