One-pot synthesis of N-Cbz-l-BMAA and derivatives from N-Cbz-l-serine
作者:Sidnei Moura、Ernani Pinto
DOI:10.1016/j.tetlet.2007.01.149
日期:2007.3
We report herein an asymmetric synthesis of the modified amino acid N-CbZ-L-BMAA and seven of its alkyl derivatives (2a-h) from N-CbZ-L-serine via ring-opening of the P-lactone (formed under modified Mitsunobu conditions) by different amines. This procedure is simple, one-pot and can generate various derivatives that can be investigated for their toxicological effects. In addition, it can be employed to produce analytical standards for water monitoring as well as labeled compounds for biotransformation studies. This toxin has been the focus of serious ecological and public concern since its implication in degenerative disease such as Alzheimer and Parkinsonism dementia. (c) 2007 Elsevier Ltd. All rights reserved.
Reaction of trimethylsilylamines with N-Cbz-L-serine-β-lactone: A convenient route to optically pure β-amino-L-alanine derivatives
作者:Elaref S. Ratemi、John C. Vederas
DOI:10.1016/s0040-4039(00)78354-7
日期:1994.10
Trimethylsilylamines, Me3Si-NR2, react with N-Cbz-L-serine-β-lactone in acetonitrile primarily by alkyl oxygen cleavage of the lactone ring to give opticallypure N-Cbz-β-amino-L-alanine derivatives in good yields. Use of halogenated solvents such as chloroform alters the regiospecificity to give primarily acyl oxygen cleavage and generate amides of N-Cbz-L-serine. The latter are also obtained by reaction