Direct Transformation of N-Protected α,β-Unsaturated γ-Amino Amides into γ-Lactams through a Base-Mediated Molecular Rearrangement
作者:Mothukuri Ganesh Kumar、Kuruva Veeresh、Sachin A. Nalawade、Raj V. Nithun、Hosahudya N. Gopi
DOI:10.1021/acs.joc.9b01936
日期:2019.12.6
of the new β,γ-double bond and subsequent 5-exo-trig cyclization of terminal amide leads to the formation of N-protected 5,5-disubstituted γ-lactam. The structures of various γ-lactams obtained from the rearrangement were studied in single crystals. Overall, the results reported here demonstrate the facile and single-step transformation of N-protected α,β-unsaturated γ-amino amides into γ-lactams and
在这里,我们报告了通过碱基介导的新分子重排,将N保护的α,β-不饱和γ-氨基酰胺单步转化为5,5-二取代的γ-内酰胺。与已知的将饱和γ-氨基酸从N到C(O)环化成相应的γ-内酰胺相反,新的重排涉及N端Cγ-到C端酰胺N之间的环化。双键从α,β→β,γ位置的迁移。新的β,γ-双键的烯胺-亚胺互变异构以及随后的末端酰胺的5-exo-trig环化导致形成N-保护的5,5-二取代的γ-内酰胺。在单晶中研究了从重排获得的各种γ-内酰胺的结构。全面的,