Isoindolines are synthesized by palladium-catalyzed coupling reaction of N-(2-iodobenzyl) anilines with α,β-unsaturated N-tosylhydrazones. The reaction has several potential advantages: (1) toleration of a wide range of functional groups, (2) easy to handle and with mild conditions, (3) enriches the isoindoline family, (4) two new bonds form in one step.
Efficient synthesis of protected cyclopropyl β-aspartylphosphates
作者:Luke A. Adams、Jonathan P. H. Charmant、Russell J. Cox、Magnus Walter、William G. Whittingham
DOI:10.1039/b311322a
日期:——
The in situ reaction of protected dehydroamino acids with derivatives of vinyldiazomethane leads to good to excellent yields of vinyl cyclopropanes via 3 + 2 dipolar cycloaddition followed by N(2) extrusion. Chromatographic separation of the cyclopropane diastereomeric products, followed by characterisation by (1)H NMR and X-ray crystallography allowed the cis and trans diastereomers to be easily identified