Synthesis of 2-methyl- and 2-methylenecyclobutane amino acids
作者:Alberto Avenoza、Jesús H. Busto、Jesús M. Peregrina、Marta Pérez-Fernández
DOI:10.1016/j.tet.2005.02.039
日期:2005.4
2-acetamidoacrylate with ketene diethyl acetal gave the cyclobutane core. Two kinds of 2-substituted cyclobutane amino acids have been obtained from this compound by means of stereocontrolled interconversion of functional groups: 1-amino-2-methylcyclobutane-1-carboxylic acids (2,4-methanovalines) and 1-amino-2-methylenecyclobutane-1-carboxylic acid. The latter amino acid can be regarded as a restricted α-methyl-α-vinylglycine
Conformational Analysis of 2-Substituted Cyclobutane-α-amino Acid Derivatives. A Synergistic Experimental and Computational Study
作者:Gonzalo Jiménez-Osés、Francisco Corzana、Jesús H. Busto、Marta Pérez-Fernández、Jesús M. Peregrina、Alberto Avenoza
DOI:10.1021/jo0521955
日期:2006.3.1
An extensive conformational study of different 2-substituted cyclobutane-α-amino acid derivatives in the solid state, in the gas phase, and in solution has been carried out. The study combines experimental techniques, such as X-ray diffraction and NMR spectroscopy, and computational methods, such as DFT calculations and molecular dynamics (MD) simulations, in a set solvent. The study reveals that the