Nickel-Catalyzed Reductive Allylation of Tertiary Alkyl Halides with Allylic Carbonates
作者:Haifeng Chen、Xiao Jia、Yingying Yu、Qun Qian、Hegui Gong
DOI:10.1002/anie.201705521
日期:2017.10.9
of all C(sp3) quaternarycenters has been successfully achieved under Ni‐catalyzed cross‐electrophile coupling of allylic carbonates with unactivated tertiary alkyl halides. For allylic carbonates bearing C1 or C3 substituents, the reaction affords excellent regioselectivity through the addition of alkyl groups to the unsubstituted allyliccarbonterminus. The allylicalkylationmethod also exhibits
a thermal [3,3]-sigmatropicrearrangement, providing compounds with N-substituted quaternary carbon centers. Cyclizations (subsequently or in situ) of the rearranged products generated hexahydro-3,4-dioxa-8a-aza-as-indacen-2-ones. Various terminally substituted allyloxy ketoesters and arylmethoxy ketoesters were found to generate tricyclic compounds via [1,3]-sigmatropicrearrangement. Finally, tricyclic
Synthesis of δ--α-aminoadipoyl--cysteinyl--allylglycine, and eight deuterated analogues, substrates for the investigation of the mechanism of action of isopenicillin n synthase.
作者:Jack E. Baldwin、Mark Bradley、Nicholas J. Turner、Robert M. Adlington、Andrew R. Pitt、Helen Sheridan
DOI:10.1016/s0040-4020(01)91015-4
日期:1991.9
The synthesis of delta-L-alpha-aminoadipoyl-L-cysteinyl-D-allylglycine (1a) from its component amino acids is described, along with the synthesis of eight analogues (1b-i) specifically deuterated at C-3 and/or C-5 of the allylglycine residue.