An Enzymatic Platform for the Highly Enantioselective and Stereodivergent Construction of Cyclopropyl‐δ‐lactones
作者:Xinkun Ren、Ningyu Liu、Ajay L. Chandgude、Rudi Fasan
DOI:10.1002/anie.202007953
日期:2020.11.23
carbene transfer mechanism for the asymmetric synthesis of cyclopropane‐fused‐δ‐lactones, which are key structural motifs found in many biologically active natural products. While hemin, wild‐type myoglobin, and other hemoproteins are unable to catalyze this reaction, the myoglobin scaffold could be remodeled by protein engineering to permit the intramolecular cyclopropanation of a broad spectrum of homoallylic
Enantioselective, rhodium catalyzed intramolecular cyclopropanations of homoallylic diazoacetates.
作者:Stephen F. Martin、Christopher J. Oalmann、Spiros Liras
DOI:10.1016/s0040-4039(00)61761-6
日期:1992.11
The homoallylic diazoacetates 3a–j underwent enantioselectiveintramolecularcyclopropanation with the rhodiumcatalyst Rh2(5S-MEPY)4 (1) to give the oxabicyclo[4.1.0]heptanes 4a–j in 71–90% enantiomeric excess and in 55–80% chemical yield.