New Methodology Toward Chiral, Non-Racemic 2,5-cis-Substituted Piperidines via Suzuki Cross-Coupling
摘要:
1,2,3,4-Tetrahydropyridines were halogenated upon treatment with iodine to obtain the desired cross-coupling precursors. Diastereoselective hydrogenation of Suzuki cross-coupling adducts allowed the facile asymmetric synthesis of 2,5-cis-substituted piperidines in five steps from readily available pyridine.
New Methodology Toward Chiral, Non-Racemic 2,5-cis-Substituted Piperidines via Suzuki Cross-Coupling
摘要:
1,2,3,4-Tetrahydropyridines were halogenated upon treatment with iodine to obtain the desired cross-coupling precursors. Diastereoselective hydrogenation of Suzuki cross-coupling adducts allowed the facile asymmetric synthesis of 2,5-cis-substituted piperidines in five steps from readily available pyridine.
Highly Regioselective Intermolecular Arylation of 1,2,3,4-Tetrahydropyridines
作者:Guillaume Pelletier、Alexandre Larivée、André B. Charette
DOI:10.1021/ol8018709
日期:2008.11.6
Using a catalytic amount of PdCl2(dppf).CH2Cl2 in combination with Ag3PO4 and NaOAc, a range of arylated 1,2,3,4-tetrahydropyridines are synthesized in good yields and with complete selectivity at the beta-position. The reaction is compatible with a variety of electron-donating and electron-withdrawing aryl iodides as well as with heteroaryl iodides. The application of these tetrahydropyridines toward the synthesis of polysubstituted piperidines is also demonstrated.