77448-58-9Relevant academic research and scientific papers
First stereocontrolled synthesis of (S)-cleonin and related cyclopropyl-substituted amino acids.
Esposito,Piras,Ramazzotti,Taddei
, p. 3273 - 3275 (2007/10/03)
[reaction: see text]. Enantiomerically pure (S)-cleonin, a key component of the antitumor antibiotic cleomycin, was prepared starting from (R)-serine. The Kulinkovich cyclopropanation of the methyl ester of N-Cbz serine acetonide gave the hydroxycyclopropyl moiety. The amino alcohol region was further oxidized to amino acid. The Kulinkovich cyclopropanation allowed also the preparation of other non-natural substituted cyclopropylglycines.
A New Versatile Synthesis of Ring-Substituted 2-Cyclopropylglycines and Related Amino Acids
Wessjohann, Ludger,Krass, Norbert,Yu, Dahai,Meijere, Armin de
, p. 867 - 882 (2007/10/02)
Alkyl 2-chloro-2-cyclopropylideneacetates 2 serve as universal starting materials for a new general synthesis of cyclopropylglycines by a simple three- to four-step methodology. 1,4-Addition of nucleophiles, substitution with azide ion, and mild catalytic
SYNTHESIS OF CLEONINE, AMINO(1-HYDROXYCYCLOPROPYL)ACETIC ACID, A NOVEL AMINO ACID CONTAINED IN CLEOMYCIN
Kato, Kuniki
, p. 4925 - 4926 (2007/10/02)
The synthesis of cleonine, amino(1-hydroxycyclopropyl)acetic acid, a novel amino acid contained in cleomycin, a new bleomycin-phleomycin group antibiotic, is described.
