Enantioselective Diels–Alder Reaction of 1,2-Dihydropyridines with Aldehydes Using β-Amino Alcohol Organocatalyst
摘要:
The enantioselective Diels Alder reaction of 1,2-dihydropyridines with aldehydes using an easily prepared optically active beta-amino alcohol catalyst was found to provide optically active isoquinuclidines, an efficient synthetic intermediate of pharmaceutically important compounds such as oseltamivir phosphate, with a satisfactory chemical yield and enantioselectivity (up to 96%, up to 98% ee). In addition, the obtained highly optically pure isoquinuclidine was easily converted to an optically active piperidine having four successive carbon centers.
Synthesis of bicyclic tetrahydropyridine enamides and enecarbamates by hetero-Cope rearrangement of nitroso cycloadducts
作者:Francesco Berti、Andrea Menichetti、Valeria Di Bussolo、Lucilla Favero、Mauro Pineschi
DOI:10.1007/s10593-018-2289-8
日期:2018.4
The hetero-Cope rearrangement reactions of inverse carbamate and amide nitroso Diels–Alder cycloadducts with 1,2-dihydropyridines to give novel tetrahydropyridine enamides and enecarbamates have been studied in detail identifying optimal reaction conditions. The possibility to obtain tetrahydropyridine enamides and carbamates containing a free OH at the C-4 position is restricted to only particular
氨基甲酸酯和酰胺亚硝基Diels-Alder环加成物与1,2-二氢吡啶的杂Cope重排反应可得到新颖的四氢吡啶烯酰胺和烯氨基甲酸酯,详细研究了最佳反应条件。当处理氨基甲酸酯亚硝基环加合物时,获得在C-4位上含有游离OH的四氢吡啶酰胺和氨基甲酸酯的可能性仅限于特定的取代方式。另一方面,从容易获得的酰胺亚硝基环加合物和催化量的亚铜盐开始,现在可以得到几种取代的4a,7,8a-四氢吡啶并[4,3- e ]-[1,4,2]二恶嗪产量中等至良好。
Synthesis and synthetic utility of 1-acyl-2-alkyl-4-trimethylstannyl-1,2-dihydropyridines
作者:Daniel L. Comins、Abdul H. Abdullah、Nathan B. Mantlo
DOI:10.1016/s0040-4039(01)91245-6
日期:1984.1
COMINS, D. L.;ABDULLAH, A. H.;MANTLO, N. B., TETRAHEDRON LETT., 1984, 25, N 43, 4867-4870
作者:COMINS, D. L.、ABDULLAH, A. H.、MANTLO, N. B.
DOI:——
日期:——
COMINS D. L.; MANTLO N. B., TETRAHEDRON LETT., 28,(1987) N 7, 759-762