One-Pot Synthesis of Homoallylic Ketones from the Addition of Vinyl Grignard Reagent to Carboxylic Esters
作者:Karl A. Hansford、James E. Dettwiler、William D. Lubell
DOI:10.1021/ol0359822
日期:2003.12.1
Fifteen homoallylic ketones have been synthesized in 26-77% yields on treatment of aromatic, aliphatic, and alpha-amino methyl carboxylates with excess vinylmagnesium bromide and catalytic amounts of a copper salt in THF. Alpha-amino homoallylic ketones derived from N-protected alpha-amino esters possessing aliphatic and alcohol side chains were synthesized in > or =98% enantiomeric purity. [reaction:
Enantiospecific gram scale synthesis of (S)-eleagnine
作者:C.S. Lood、M. Nieger、A.M.P. Koskinen
DOI:10.1016/j.tet.2015.05.063
日期:2015.7
An alternative route to the tetrahydro-p-carboline scaffold is presented, where the amino acid L-alanine was transformed to (S)-eleagnine in a straightforward and scalable manner yielding the target compound in enantiopure form on gram scale. (C) 2015 Elsevier Ltd. All rights reserved.