A highly enantio- and diastereoselective synthesis of highly functionalized isochromans was achieved through an organocatalyzed dominoreaction. Quinidine as the catalyst initiates a peroxyhemiacetalization/oxa-Michael/desymmetrization domino sequence between various 2,5-cyclohexadienone-tethered aryl aldehydes with hydroperoxides to generate the single diastereomers of isochromans appended with a
Irie et al., Journal of the Chemical Society, 1959, p. 1446,1453
作者:Irie et al.
DOI:——
日期:——
Asymmetric Synthesis of Hydrophenanthrenones Bearing Multiple Stereogenic Centers via Squaramide-Catalyzed Domino 1,4-/1,4-Addition Desymmetrization Sequence
作者:Manisha Sharma、Tamanna、Pankaj Chauhan
DOI:10.1021/acs.orglett.3c03167
日期:2023.11.3
up to five contiguous stereogenic centers has been accomplished. A bifunctional squaramide enables a domino 1,4-/1,4-addition desymmetrization reaction sequence between the newly developed β-nitrostyrene-tethered 2,5-cyclohexadienones and trisubstituted enolizable nucleophiles to provide direct access to the polyfunctionalized hydrophenanthren-2(1H)-ones in excellent enantio- (up to >99%) and diastereoselectivity
已经完成了一种前所未有的立体选择性途径,用于获得具有多达五个连续立体中心的四氢菲-2(1H ) -酮。双官能方酰胺能够在新开发的 β-硝基苯乙烯系链 2,5-环己二烯酮和三取代烯醇化亲核试剂之间进行多米诺骨牌 1,4-/1,4-加成去对称反应序列,从而直接获得多官能化氢菲-2(1 H )-具有优异的对映选择性(高达 >99%)和非对映选择性(高达 >20:1)。通过使用假对映体方酰胺,还可以以优异的立体控制获得氢菲衍生物的对映体。