3-(2S-Heptylcycloprop-1S-yl)propanoic acid 2-phenylethanamide was synthesised from cis-cyclopropan-1,2-dimethanol via enzymatic desymmetrisation of the dibutyrate; it gave identical NMR spectroscopic data to those reported for grenadamide but had an equal and opposite absolute rotation, indicating that the latter is the 2R,1R-enantiomer. (C) 2003 Elsevier Ltd. All rights reserved.
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
作者:Juma'a R. Al Dulayymi、Mark S. Baird、Keith Jones
DOI:10.1016/j.tet.2003.11.006
日期:2004.1
3-(2S-Heptylcycloprop-1S-yl)propanoic acid 2-phenylethanamide was synthesised from cis-cyclopropan-1,2-dimethanol via enzymatic desymmetrisation of the dibutyrate; it gave identical NMR spectroscopic data to those reported for grenadamide but had an equal and opposite absolute rotation, indicating that the latter is the 2R,1R-enantiomer. (C) 2003 Elsevier Ltd. All rights reserved.