Journal
ORGANIC LETTERS
Volume 23, Issue 21, Pages 8419-8423Publisher
AMER CHEMICAL SOC
DOI: 10.1021/acs.orglett.1c03101
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Funding
- National Natural Science Foundation of China [21890723, 2181175]
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Highly diastereo- and enantioselective allylation of isatins with 3-substituted allylboronic compounds was achieved using the chiral N,N'-dioxide/Lu(OTf)(3) complex, leading to enantioenriched 3-allyl-3-hydroxyoxindoles with adjacent tetrasubstituted tertiary or tetrasubstituted quaternary stereogenic centers. The synthetic utility of the reaction was demonstrated by further transformation of the product to a tetrahydrofuranyl oxindole derivative.
A highly diastereo- and enantioselective allylation of isatins with 3-substituted allylboronic compounds was achieved by the chiral N,N'-dioxide/Lu(OTf)(3) complex. This approach provides an efficient route to useful enantioenriched 3-allyl-3-hydroxyoxindoles with adjacent tetrasubstituted tertiary or tetrasubstituted quaternary stereogenic centers. Density functional theory calculations were performed to understand the different diastereoselection between the background reaction and catalytic process. Moreover, allylation with potassium allyltrifluoroborate was accomplished by the chiral N,N'-dioxide/In(OTf)(3) complex. The synthetic utility was demonstrated by further transformation of the product to a tetrahydrofuranyl oxindole derivative.
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