Highly selective enantiomer differentiation in intramolecular cyclopropanation reactions of racemic secondary allylic diazoacetates.
作者:Michael P. Doyle、Alexey B. Dyatkin、Alexey V. Kalinin、Daniel A. Ruppar、Stephen F. Martin、Mark R. Spaller、Spiros Liras
DOI:10.1021/ja00149a031
日期:1995.11
Synthesis of bicyclo[3.2.2]nonadienones via enantioselective cyclopropanation of racemic cyclohexen-3-yl diazoacetate
作者:Paul Müller、Gérald Bernardinelli、Patrice Nury
DOI:10.1016/s0957-4166(02)00105-2
日期:2002.4
Optically active (1S,5R)-(+)-3-azabicyclo[3.2.2]non-6-en-2-one (+)-7 was synthesized via enantioselective intramolecular cyclopropanation of racemic cyclohexen-3-yl diazoacetate 10 in the presence of [Rh2((2S)-meox}4] catalyst. The cyclopropanation product (−)-9 was converted to the azide 8, which underwent successive Curtius and 3-aza-Cope rearrangements to afford 18, which was reduced to the bicyclic