A Novel Route to 6-Substituted Piperidin-3-ols via Domino Cyclization of 2-Hydroxy-6-phosphinyl-5-hexenyl Tosylates with Primary Amines: Synthesis of (±)-Pseudoconhydrine and (±)-epi-Pseudoconhydrine
作者:Ernst Schaumann、Cathrin Scherner、Jens-Kerim Ergüden、Gunadi Adiwidjaja
DOI:10.1055/s-0033-1338629
日期:——
SN2–Michael reactions with primary amines to give 6-phosphinylmethylpiperidin-3-ols. The phosphinyl unit can be used in Horner olefination reactions. This approach is applied to the synthesis of racemic pseudoconhydrine and its epimer. 2-Hydroxy-6-phosphinyl-5-hexenyl tosylates, oxirane ring-opening products derived from glycidyl tosylates and phosphinyl-substituted allyl anions, undergo domino SN2–Michael
摘要 2-羟基-6-亚膦酰基-5-己烯基甲苯磺酸盐,由缩水甘油基甲苯磺酸盐和次膦酰基取代的烯丙基阴离子衍生的环氧乙烷开环产物,与伯胺发生多米诺S N 2-Michael反应,生成6-次膦酰基甲基哌啶-3-醇。膦基单元可用于霍纳烯化反应中。该方法适用于外消旋假二氢及其差向异构体的合成。 2-羟基-6-亚膦酰基-5-己烯基甲苯磺酸盐,由缩水甘油基甲苯磺酸盐和次膦酰基取代的烯丙基阴离子衍生的环氧乙烷开环产物,与伯胺发生多米诺S N 2-Michael反应,生成6-次膦酰基甲基哌啶-3-醇。膦基单元可用于霍纳烯化反应中。该方法适用于外消旋假二氢及其差向异构体的合成。