TEWARI R. S.; NAGPAL D. K.; CHATURVEDI S. C., INDIAN J. CHEM., 1980 B17, NO 6, 569-571
作者:TEWARI R. S.、 NAGPAL D. K.、 CHATURVEDI S. C.
DOI:——
日期:——
Achieving Enantioselectivity in Difficult Cyclohexa-1,3-diene Diels–Alder Reactions with Sulfur-Stabilized Silicon Cations as Lewis Acid Catalysts
作者:Polina Shaykhutdinova、Martin Oestreich
DOI:10.1021/acs.orglett.8b02945
日期:2018.11.16
A novel cationic silicon–sulfur Lewis pair with a chiral H8-binaphthyl backbone is reported. It catalyzes otherwise sluggish Diels–Alderreactions of cyclohexa-1,3-diene and chalcone derivatives in good yields and decent enantioselectivities (up to 81% ee). The enantioinduction is highest with a [1,1′-biphenyl]-4-yl substituent at the carbonyl carbon atom. This moiety can be later converted into a