Highly Stereoselective Synthesis of Fused Cyclopropane-γ-Lactams via Biocatalytic Iron-Catalyzed Intramolecular Cyclopropanation
作者:Xinkun Ren、Ajay L. Chandgude、Rudi Fasan
DOI:10.1021/acscatal.9b05383
日期:2020.2.7
We report the development of an iron-based biocatalytic strategy for the asymmetricsynthesis of fused cyclopropane-γ-lactams, which are key structural motifs found in synthetic drugs and bioactive natural products. Using a combination of mutational landscape and iterative site-saturation mutagenesis, sperm whale myoglobin was evolved into a biocatalyst capable of promoting the cyclization of a diverse
Conformational and medium effects on intramolecular carbene reactions
作者:R. R. Rando
DOI:10.1021/ja00760a033
日期:1972.3
Enantioselective intramolecular cyclopropanation of N-allylic- and N-homoallylic diazoacetamides catalyzed by chiral dirhodium(II) catalysts
作者:Michael P. Doyle、Michail Y. Eismont、Marina N. Protopopova、Michelle M.Y. Kwan
DOI:10.1016/s0040-4020(01)80842-5
日期:1994.1
Diazodecomposition of N-(tert-butyl)-N-(3-buten-1-yl)diazoacetamides catalyzed by dirhodium(II) tetrakis[methyl 2-pyrrolidone-5(S)-carboxylate], Rh-2(5S-MEPY)(4), and tetrakis[methyl 2-oxazolidinone-4(S)-carboxylate], Rh-2(4S-MEOX)(4), forms products from intramolecular cyclopropanation in good yields with enantiomeric excesses ranging from 60-90%. Intramolecular cyclopropanation with N,N-diallyldiazoacetamide (72% ee) is competitive with intramolecular [3+2] dipolar cycloaddition.
Doyle Michael P., Eismont Michail Y., Protopopova Marina N., Kwan Michell+, Tetrahedron, 50 (1994) N 6, S 1665-1674