A 2,3-butanedione protected chiral glycine equivalent—a new building block for the stereoselective synthesis of enantiopure N-protected α-amino acids
作者:Darren J. Dixon、Christopher I. Harding、Steven V. Ley、D. Matthew G. Tilbrook
DOI:10.1039/b210673f
日期:2003.2.7
A newchiralglycine equivalent 7 has been synthesised from glycidol using a chiral memory protocol, and its use in the synthesis of N-Z protected alpha-amino acids was demonstrated in a series of diasteroselective lithium enolate alkylation reactions and subsequent acid hydrolyses.
The preparation and alkylation of a butanedione-derived chiral glycine equivalent and its use for the synthesis of α-amino acids and α,α-disubstituted amino acids
作者:Christopher I. Harding、Darren J. Dixon、Steven V. Ley
DOI:10.1016/j.tet.2004.06.063
日期:2004.8
benzyloxycarbonyl protected glycine equivalent 2 has been prepared in enantiopure form and has been used in the synthesis of both α-substituted amino acids and α,α-disubstituted amino acids. The process involved deprotonation to form the corresponding enolates which underwent stereoselectivealkylation with various electrophiles and upon hydrolysis gave the corresponding amino acidderivatives as enantiomerically