Use of tandem and domino processes for a fast access to N-heterocycles
Identifieur interne : 000131 ( Main/Exploration ); précédent : 000130; suivant : 000132Use of tandem and domino processes for a fast access to N-heterocycles
Auteurs : Ronan Le Goff [France]Source :
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Abstract
N-heterocycle scaffolds are found in many synthetic and medicinal chemical compounds explaining the high interest for developing efficient synthetic methodologies to reach such structures. In that field, our group has developed over the years innovative routes to y-lactams and bicyclic γ- and δ-lactams using tandem and domino reactions. Based on those previous works, we have developed two new methods to synthesize N-heterocycles. A tandem aza-MIRC (Michael Induced Ring Closure) sequence have been investigated to access pyrrolidines whereas the bicyclique scaffold of bislactames have been obtained using a domino oxa-Michael/aza-MIRC pathway. These two new methods have been then applied to the syntheses of more complexes and thus challenging backbones. The aza-MIRC tandem process have been used for the total and formal synthesis of alkaloids Coerulescine and Martinelline, respectively, whereas the domino oxa-Michael/aza-MIRC sequence has proved to be a powerful tool for stereoselective access to enantioenriched spirooxindolic compounds. DFT calculations studies have allowed elucidation of the diastereoselectivity and double chirality transfer of the domino reaction therefore could be used in the future to develop efficient total syntheses.
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In that field, our group has developed over the years innovative routes to y-lactams and bicyclic γ- and δ-lactams using tandem and domino reactions. Based on those previous works, we have developed two new methods to synthesize N-heterocycles. A tandem aza-MIRC (Michael Induced Ring Closure) sequence have been investigated to access pyrrolidines whereas the bicyclique scaffold of bislactames have been obtained using a domino oxa-Michael/aza-MIRC pathway. These two new methods have been then applied to the syntheses of more complexes and thus challenging backbones. The aza-MIRC tandem process have been used for the total and formal synthesis of alkaloids Coerulescine and Martinelline, respectively, whereas the domino oxa-Michael/aza-MIRC sequence has proved to be a powerful tool for stereoselective access to enantioenriched spirooxindolic compounds. DFT calculations studies have allowed elucidation of the diastereoselectivity and double chirality transfer of the domino reaction therefore could be used in the future to develop efficient total syntheses.</div></front></TEI><affiliations><list><country><li>France</li></country><region><li>Haute-Normandie</li><li>Région Normandie</li></region><settlement><li>Le Havre</li></settlement><orgName><li>Université du Havre</li></orgName></list><tree><country name="France"><region name="Région Normandie"><name sortKey="Le Goff, Ronan" sort="Le Goff, Ronan" uniqKey="Le Goff R" first="Ronan" last="Le Goff">Ronan Le Goff</name></region></country></tree></affiliations></record>Pour manipuler ce document sous Unix (Dilib)
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