Synthesis of α-amino acids with β,γ-unsaturated side chains
作者:Arlindo L. Castelhano、Stephen Horne、Gregg J. Taylor、Roland Billedeau、Allen Krantz
DOI:10.1016/s0040-4020(01)86051-8
日期:1988.1
α-Amino acids with allenyl, vinyl, and acetylenic side chains can be synthesized using non-enolate based strategies. The ester enolate-Claisen rearrangement applied to propargylic esters of N -protected α-amino acids ie of limited utility since only poor yields of allenic product are obtained with the N-Boc glycine esters, the system which give the most reproducible results. However, α-allenyl-α-amino
Preparation of compounds useful for the detection of hypoxia
申请人:Dolbier R. William
公开号:US20060159618A1
公开(公告)日:2006-07-20
Novel
18
F-fluorine compounds useful for non-invasive imaging techniques such as PET, for detecting tissue hypoxia and methods for preparing them are disclosed. Novel intermediate compounds and methods for preparing them are also disclosed. Diagnostic kits useful in practicing the methods of claimed invention are also provided.