Convenient synthesis of (+)-cis-4-(N-adamantyl-N-methylamino)-2,3-methano-2-phenylbutan-1-ol as a candidate of anti-Alzheimer’s medicine via catalytic enantioselective Simmons–Smith reaction using l-phenylalanine-derived disulfonamide
作者:Yuya Kawashima、Tetsuya Ezawa、Mai Yamamura、Taisuke Harada、Takuya Noguchi、Nobuyuki Imai
DOI:10.1016/j.tetlet.2015.12.113
日期:2016.2
the carboxylic acid with 1-adamantanamine sulfate in aqueous organic solvent to afford the corresponding 2,3-methano-3-phenylbutanamide in excellent yields. Convenient enantioselective synthesis of (+)-cis-4-(N-adamantyl-N-methylamino)-2,3-methano-2-phenylbutan-1-ol ((+)-AMMP) was achieved in 35% overall yield from the starting 1,4-diol via our developed key reactions.
(Z)-4-叔丁基二苯基甲硅烷氧基-3-苯基丁-2-烯-1-醇的催化对映选择性Simmons-Smith反应,使用1-苯丙氨酸衍生的二磺酰胺,得到(+)-顺式-4-叔丁基二苯基甲硅烷氧基-2 ,定量产率为71%ee的,3-甲基-3-苯基丁烷-1-醇。将2,3-甲基-3-苯基丁烷-1-醇轻松转化为相应的2,3-甲基-3-苯基丁酸,然后在有机溶剂中将羧酸与1-金刚烷胺硫酸酰胺化,得到相应的2,3-甲基-3-苯基丁酰胺,收率极高。(+)-顺式-4-(N-金刚烷基-N的便捷对映选择性合成通过我们开发的关键反应,从起始的1,4-二醇以35%的总收率获得了-(甲基氨基)-2,3-甲基-2-苯基丁-1-醇((+)-AMMP)。