and scalable processes to access these natural products is in high demand. Herein we report the development of a short, scalable total synthesis of (−)‐α‐kainicacid, a useful compound in neuropharmacology that is, however, limited in supply from natural resources. The synthesis features sequential platinum‐catalyzed direct allylic aminations and thermal ene‐cyclization, enabling the gram‐scale synthesis
Tandem approaches for the synthesis of functionalized pyrrolidones: efficient routes toward allokainic acid and kainic acid
作者:Chinmay Bhat、Santosh G. Tilve
DOI:10.1016/j.tetlet.2012.11.007
日期:2013.1
Tandem approaches for the synthesis of pyrrolidone precursor of allokainic acid and kainic acid are described. The synthesis of pyrrolidone intermediate of allokainic acid is achieved by tandem Wittig–Michael reaction and tandem amidation-Michael reaction while one pot amidation—Ene-esterification is employed for the synthesis of Ganem intermediate (2:1) of kainic acid.
Generation of glycinyl radicals via a 1,5-hydrogen atom transfer reaction. Applications to γ-lactam formation
作者:J. Rancourt、V. Gorys、E. Jolicoeur
DOI:10.1016/s0040-4039(98)01042-9
日期:1998.7
Glycinyl radicals can be generated using a simple protecting/radical translocating group and used in the preferential formation of trans-3,4-disubstituted γ-lactams via a radical cyclisation reaction.
Modular Synthesis of Cyclopropane‐Fused
<i>N</i>
‐Heterocycles Enabled by Underexplored Diazo Reagents
作者:Matthieu J. R. Richter、Frédéric J. Zécri、Karin Briner、Stuart L. Schreiber
DOI:10.1002/anie.202203221
日期:2022.9.19
Modularsynthesis of cyclopropane-fused N-heterocycles from readily available amines was achieved. Key to the disclosed strategy was the development and implementation of reactive α-diazo acylating agents, providing access to structurally and functionally diverse products. Application of the method is showcased in the concise syntheses of therapeutic agents milnaciprane and amitifadine.
Tandem Wittig−Ene Reaction Approach to Kainic Acid
作者:Mahesh S. Majik、Peruninakulath S. Parameswaran、Santosh G. Tilve
DOI:10.1021/jo900196t
日期:2009.5.1
example of a tandem Wittig−intramolecular ene reaction approach and its application toward the synthesis of kainicacid is reported. The synthetic pathway involves conversion of prenyl bromide into phosphorane 3, followed by one-pot Wittig olefination and an ene reaction with glyoxalic acid to give the cis fused pyrrolidine skeleton of kainicacid.