A bismuth(III) triflate catalyzed three-component synthesis of α-substituted amides starting from amides, aldehydes, and (hetero)arenes is reported. The reaction has a broad substrate scope, encompassing formaldehyde as well as aryl and alkyl aldehydes. Low catalyst loadings are required, and water is formed as the only side product. The scope and limitation of this method will be discussed.
Catalytic Asymmetric Chlorinative Dearomatization Reaction of Benzofurans
作者:Xiao-Wei Liang、Chao Zheng、Shu-Li You
DOI:10.1002/adsc.201501184
日期:2016.6.30
A catalytic asymmetric chlorinative dearomatizationreaction of benzofuran derivatives was achieved by using hydroquinidine 1,4‐phthalazinediyl diether [(DHQD)2PHAL] as the catalyst and N‐chlorophthalimide (NCP) as the chlorinating reagent. A series of chlorinated spiro[benzofuran‐2,5′‐oxazole]s bearing two contiguous stereogenic centers was obtained in high yields (up to 99%) with excellent enantioselectivity
Bi(OTf)3-Catalyzed Three-Component Synthesis of Amidomethylarenes and -Heteroarenes
作者:Georg Manolikakes、Angelika Schneider
DOI:10.1055/s-0033-1339654
日期:——
A highly efficient Bi(OTf)(3)-catalyzed multicomponent synthesis of amidomethylated arenes and heteroarenes from readily available starting materials has been developed. This reaction proceeds under mild conditions, has a broad substrate scope, and in addition water is generated as only side product.