Gasper Marc

Convenient Synthesis and Reactivity of Ethyl 8‐amino‐6‐methyl‐2,3‐dihydro‐4H‐1‐benzopyran‐2‐carboxylate

Abstract We report and comprehensively describe the synthesis and reactivity of ethyl 8‐amino‐6‐methyl‐3,4‐dihydro‐2H‐1‐benzopyran‐2‐carboxylate. This peptidomimetic building block provides a constrained template that allows for the introduction of various functionalities in a specific spatial orientation.

High Yield Phase Transfer N-alkylation of Some Benzodiazepines by Esters of ω-Halo Acids

Abstract Different i, 4-benzodiazepinyl acetic and propionic acids were prepared by hydrogenolysis of benzyl or hydrolysis of the corresponding ethyl esters which were obtained by phase transfer alkylation of respective amides with benzyl bromoacetate and benzyl or ethyl 2-bromopropionate.

A Short Way to Esters of 1-Oxyl-2,2,5,5-Tetramethylpyrrolidine-3-carboxylic Acid by Favorski Rearrangement

Abstract The reaction of 3-bromo-4-oxo-l-oxyl-2,2,6,6-tetramethylpiperidine (1) with a solid sodium, alkoxide of primary or secondary alcohol provides a short way to prepare ester of 3-carboxy-1-oxyl-2,2,5,5-tetramethylpyrrolidine where the ring contraction from six (1) to five (6a-f) in a Favorski rearrangement occurs.