Stereocontrolled Synthesis of 3-(<i>trans</i>-2-Aminocyclopropyl)alanine, a Key Component of Belactosin A
作者:Alan Armstrong、James N. Scutt
DOI:10.1021/ol0346887
日期:2003.6.1
report a concise synthesis of 3-(trans-2-aminocyclopropyl)alanine, a component of belactosin A, using asymmetric alkylation of a glycine enolate in the presence of chiral phase-transfer catalysts to control the configuration at C2. Reaction of protected glycidol with triethyl phosphonoacetate (Wadsworth-Emmons cyclopropanation) is used for enantiospecific preparation of an intermediate cyclopropanecarboxylate
The Ru(II)-Pheox-catalyzed asymmetric cyclopropanation of vinylcarbamates with diazoesters resulted in the corresponding cyclopropylamine derivatives in high yield and excellent diastereoselectivity (up to 96:4) and enantioselectivity (up to 99% ee).
A Selective Deprotection Strategy for the Construction of <i>trans</i>-2-Aminocyclopropanecarboxylic Acid Derived Peptides
作者:Thomas Boddaert、James E. Taylor、Steven D. Bull、David J. Aitken
DOI:10.1021/acs.orglett.8b03533
日期:2019.1.4
A procedure allowing access to unprecedented tripeptides containing a trans-2-aminocyclopropanecarboxylic acid residue in their central position has been established. The key features of the strategy are the use of a masked trans-2-aminocyclopropanecarboxylic acid monomer equivalent for C-terminal coupling and full N-Boc protection of all amide groups until the final step.