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Updated: Aug 23, 2026

Facile Preparation of (2Z,4E)-Dienamides by the Olefination of Electron-deficient Alkenes with Allyl Acetate
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Following an ISES lead: the first examples of asymmetric Ni(0)-mediated allylic amination
David B Berkowitz1, Gourhari Maiti
1Department of Chemistry, University of Nebraska, Lincoln, NE 68588-0304, USA. dbb@unlserve.unl.edu
Abstract:
An ISES (in situ enzymatic screening) lead pointed to conditions (PMP N-protecting group, Ni(cod)(2) catalyst precursor) under which chiral, bidentate phosphines could promote Ni(0)-mediated allylic amination. Therefore, bidentate phosphines bearing central, axial, and planar chirality were examined with two model substrates of interest for PLP-enzyme inhibitor synthesis. In the best case, with (R)-MeO-BIPHEP, vinylglycinol derivative 2 was obtained in 75% ee (97% ee, one recrystallization) from 1. Further manipulation provided a Ni(0)-mediated entry into l-vinylglycine. [reaction: see text]
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