A two-step synthesis of the bioprotective agent JP4-039 from N-Boc-l-leucinal
作者:Barbara Bernardim、Antonio C.B. Burtoloso
DOI:10.1016/j.tet.2013.10.059
日期:2014.5
An expedited synthesis of the bioprotective agent JP4-039 is described from N-Boc-l-leucinal in 50% overall yield. The synthesisinvolves the use of an α,β-unsaturated diazoketone as the key intermediate, followed by a photochemical Wolff rearrangement in the presence of 4-amino-TEMPO (4-AT).
Nickel-Catalyzed Synthesis of Acrylamides from α-Olefins and Isocyanates
作者:Kristin D. Schleicher、Timothy F. Jamison
DOI:10.1021/ol063111x
日期:2007.3.1
[reaction: see text] The nickel(0)-catalyzed coupling of alpha-olefins and isocyanates proceeds in the presence of the N-heterocyclic carbene ligand IPr to provide alpha,beta-unsaturated amides. Carbon-carbon bond formation occurs preferentially at the 2-position of the olefin. The N-tert-butyl amide products can be converted to the corresponding primary amides under acidic conditions.
Efficient and convenient palladium-catalyzed alkoxy- and aminocarbonylations of cinnamoyl chloride and aliphatic allyl chlorides to synthesize β,γ-unsaturated esters/amides undermild condition were developed.
Reductive Passerini/Tsuji–Trost Strategy towards β,γ-Unsaturated Amides
作者:Laurent El Kaïm、Aurélie Dos Santos
DOI:10.1055/s-0033-1340187
日期:——
The Passerini reaction of α,β-unsaturated aldehydes with formic acid followed by a reductive Tsuji–Trost reaction affords β,γ-unsaturated amides. The overall process may be viewed as a one-carbon homologation of unsaturated aldehydes into amides.