Asymmetric Decarboxylative Allylation of Oxindoles
摘要:
An asymmetric decarboxylative palladium-catalyzed allylation of alkyl- and aryl-substituted oxindoles has been developed, enabling the installation of an all-carbon quaternary chiral center at the oxindole 3-position in excellent yields and good to excellent enantioselectivity. An intriguing substrate-dependent reversal in stereoselectivity has been observed, whereby the size of the substituent determines the facial selectivity in the allylation step.
A novel, efficient and environmentally friendly synthetic method has been developed for C(sp)-H selenation of arylacetamides with readily available diselenides as selenating reagents at room temperature. This protocol is applicable to a list of wide-ranging arylacetamides and diselenides, and provides various α-selenylated aryl amide derivatives with high yield using choline hydroxide (ChOH) as a green
Asymmetric Decarboxylative Allylation of Oxindoles
作者:Vilius Franckevičius、James D. Cuthbertson、Mark Pickworth、David S. Pugh、Richard J. K. Taylor
DOI:10.1021/ol201613a
日期:2011.8.19
An asymmetric decarboxylative palladium-catalyzed allylation of alkyl- and aryl-substituted oxindoles has been developed, enabling the installation of an all-carbon quaternary chiral center at the oxindole 3-position in excellent yields and good to excellent enantioselectivity. An intriguing substrate-dependent reversal in stereoselectivity has been observed, whereby the size of the substituent determines the facial selectivity in the allylation step.
Cobalt-catalyzed direct α-hydroxymethylation of amides with methanol as a C1 source
作者:Ben Ma、Rongxia Sun、Jingya Yang
DOI:10.1039/d1cc06501g
日期:——
A cobalt-catalyzed α-hydroxymethylation of amides with methanol as the C1 source has been developed.