Carbohydrate-Derived Bis(oxazoline) Ligand in the Total Synthesis of Grenadamide
作者:Mike Boysen、Tobias Minuth
DOI:10.1055/s-0030-1258143
日期:2010.8
Using an optimised carbohydrate-based bis(oxazoline) ligand and copper(I) triflate, unactivated aliphatic alkenes were cyclopropanated with simple ethyl diazoacetate, giving the corresponding products in good yields and high stereoselectivities. The trans-disubstituted cyclopropyl carboxylic acid ester derived from 1-nonene was subsequently used as the key intermediate for the synthesis of the (+)-enantiomer