A unified synthesis of all stereoisomers of 2-(aminomethyl)cyclobutane-1-carboxylic acid
作者:Virginie André、Marjolaine Gras、Hawraà Awada、Régis Guillot、Sylvie Robin、David J. Aitken
DOI:10.1016/j.tet.2013.02.063
日期:2013.4
All four stereoisomers of 2-(aminomethyl)cyclobutane-1-carboxylic acid have been prepared starting from a single chirally derivatized unsaturated γ-lactam. A photochemical [2+2] cycloaddition reaction of this compound with ethylene was employed to create the four-membered ring exclusively with a cis ring configuration. The two diastereoisomers were separated conveniently by chromatography then the