205517-34-6Relevant articles and documents
2-Halo-diketopiperazines as chiral glycine cation equivalents
Bull, Steven D.,Davies, Stephen G.,Garner, A. Christopher,Savory, Edward D.,Snow, Emma J.,Smith, Andrew D.
, p. 3989 - 4001 (2007/10/03)
A range of (2S,5S)-5-isopropyl-2-halo-N,N′-bis-(p-methoxybenzyl)- piperazine-3,6-diones 8 (Cl), 11, 12 (F) and 13 (Br) have been prepared, either via electrophilic halogenation of the corresponding lithiated diketopiperazine, or via transhalogenation from
Chiral relay auxiliary for the synthesis of enantiomerically pure α-amino acids
Bull, Steven D.,Davies, Stephen G.,Epstein, Simon W.,Ouzman, Jacqueline V. A.
, p. 659 - 660 (2007/10/03)
Chiral auxiliary (3S)-N,N′-bis(p-methoxybenzyl)-3-iso-propylpiperazine-2,5-dione employs a chiral relay network based on non-stereogenic N-benzyl protecting groups to enhance diastereocontrol during enolate alkylation.
A chiral relay auxiliary for the synthesis of homochiral α-amino acids
Bull, Steven D.,Davies, Stephen G.,Epstein, Simon W.,Leech, Michael A.,Ouzman, Jacqueline V. A.
, p. 2321 - 2330 (2007/10/03)
A new chiral auxiliary (3S)-N,N′-bis(p-methoxybenzyl)-3-isopropylpiperazine-2,5-dione 7 has been developed for the asymmetric synthesis of α-amino acids. The auxiliary 7 employs a novel chiral relay network based on non-stereogenic N-benzyl protecting groups which enhance the diastereoselectivity observed during alkylation of its C6 enolate 25.