3‐(Methoxycarbonyl)Cyclobutenone as a Reactive Dienophile in Enantioselective Diels–Alder Reactions Catalyzed by Chiral Oxazaborolidinium Ions
作者:Peng Yan、Changxu Zhong、Jie Zhang、Yu Liu、Huayi Fang、Ping Lu
DOI:10.1002/anie.202014308
日期:2021.2.23
Cyclobutenone has been used as a highly reactivedienophile in Diels–Alder reactions, however, no enantioselective example has been reported. We disclose herein a chiral oxazaborolidine‐aluminum bromide catalyzed enantioselective Diels–Alder reaction of 3‐alkoxycarbonyl cyclobutenone with a variety of dienes. Furthermore, a total synthesis of (−)‐kingianin F was completed for the first time via enantioenriched
MARTIN, H. -D.;IDEN, R.;MAIS, F. -J.;KLEEFELD, G.;STEIGEL, A.;FUHR, B.;RU+, TETRAHEDRON LETT., 1983, 24, N 49, 5469-5472
作者:MARTIN, H. -D.、IDEN, R.、MAIS, F. -J.、KLEEFELD, G.、STEIGEL, A.、FUHR, B.、RU+
DOI:——
日期:——
Synthesis of cyclobuteniminium salts derived from aldo-keteniminium salts and study of their reactivity in Diels–Alder reaction
作者:Alexandre Lumbroso、Saron Catak、Sarah Sulzer-Mossé、Alain De Mesmaeker
DOI:10.1016/j.tetlet.2014.10.013
日期:2014.12
The synthesis of broad scope of novel monosubstituted cyclobuteniminium salts derived from aldo-keteniminium salts and acetylene or 1-propyne is described. The reactivity of cyclobuteniminium salts in Diels–Alderreactions has been studied in detail by DFT calculations and by performing competition reaction with cyclobutenone derivatives.