Origins of the Regioselectivities in the Diels−Alder Reactions of Vinylindenes with 1,4-Quinone Monoketal and Acrolein Dienophiles
作者:Amy E. Hayden、Jason DeChancie、Alexander H. George、Mingji Dai、Maolin Yu、Samuel J. Danishefsky、K. N. Houk
DOI:10.1021/jo901473h
日期:2009.9.4
(B3LYP/6-31G(d)) have elucidated the origins of regioselectivities in the Diels−Alder reaction of vinylindene with a 1,4-quinone monoketal reaction that was employed as the key step in the synthesis of fluostatin C. Frontier Molecular Orbital theory and an electrostatic model are applied to the reactions of alkyl-substituted and vinylindene dienes with 1,4-quinone monoketal and acrolein dienophiles. Regiochemical
A Direct Route to Fluostatin C by a Fascinating Diels−Alder Reaction
作者:Maolin Yu、Samuel J. Danishefsky
DOI:10.1021/ja7113757
日期:2008.3.1
The Diels-Alderreactions between vinylindenes (5 or 6) as the dienes with quinoneketals (7 or 8) or with methacrolein as the dienophiles were investigated. The remarkable regioselectivities of these Diels-Alder adducts suggested that the regiopreferences of these dienes and dienophiles in these cases are not a fixed property of each component of the cycloaddition but are mutually contigent. This paper
研究了作为二烯的乙烯基茚(5 或 6)与醌缩酮(7 或 8)或甲基丙烯醛作为亲二烯体之间的 Diels-Alder 反应。这些 Diels-Alder 加合物的显着区域选择性表明,在这些情况下,这些二烯和亲二烯体的区域偏好不是环加成的每个组分的固定特性,而是相互并存的。本文展示了如何将 6 和 8 之间的 Diels-Alder 反应应用于氟他汀 C 和 E 的首次全合成。