A novel solid support for derivatization and subsequent N-alkylation of secondary amines: Preparation of N-alkylated 5- and 6-alkoxy-1,2,3,4-tetrahydroisoquinolines via mitsunobu reaction
作者:Petri Heinonen、Harri Lönnberg
DOI:10.1016/s0040-4039(97)10286-6
日期:1997.12
A hydroxymethylated polystyrene resin has been converted to its vinylsulfonylethyl ether (1) by DBU catalyzed addition of the hydroxy groups to divinyl sulfone. The support obtained was used to convert 5- and 6-(tetrahydropyran-2-yloxy)-1,2,3,4-tetrahydroisoquinolines to a set of N-alkylated tetrahydroisoquinolines bearing various 5- and 6-alkoxy substituents (5a-m). The synthesis involved attachment
羟甲基化的聚苯乙烯树脂已通过DBU催化将羟基基团加到二乙烯基砜中而转化为其乙烯基磺酰基乙基醚(1)。获得的载体用于将5-和6-(四氢吡喃-2-基氧基)-1,2,3,4-四氢异喹啉转化为一组带有各种5-和6-烷氧基取代基的N-烷基化四氢异喹啉(5a-m )。合成包括通过迈克尔加成反应将起始原料连接到载体上,酸催化除去四氢吡喃基保护基,Mitsunobu醚化反应,与烷基胺季铵化,以及与二异丙基乙胺在溶液中释放。