REACTIONS OF 2,3-DIARYL-1-METHYL-4,5-DIHYDROIMIDAZOLIUM IODIDES WITH NUCLEOPHILIC REAGENTS
摘要:
2,3-Diaryl imidazolium salts, represented by 1 and 2, reacted with 2-ethanolamine or ethylenediamine to produce 2-aryl oxazolines or imidazolines 5-8 respectively. Their hydrolysis resulted in ring-opened ethylenediamine derivatives 9 and 10. The reduction of 1 and 2 produced partially reduced imidazolidines 11, 12 and 11 reacted further with tryptamine to provide 2,3,4,9-tetrahydro-1-phenyl 1H-pyrido[3,4-b]indole, 13. In all these reactions one-carbon units were successfully transferred to the nucleophilic acceptors, which mimic the one-carbon unit transfer function for tetrahydrofolate coenzymes.
1 H -4,5-二氢咪唑鎓盐1容易与产生环状产物的亲核试剂反应,该环状产物可以是稳定的或转化为维持结构乙二胺单元的无环化合物。用甲基碘化镁化合物1e可得到预期的咪唑烷,但在取代的1-芳基-3-甲基-2-苯基盐1b-d的情况下,分离出N-芳基-N'-甲基乙二胺3b-d和苯乙酮(4) ,代表C-2单元向亲核碳转移的过程。与碱性氰化物盐1有效反应,得到α,α-二氨基腈5。在这些化合物中,氰基可以很容易地被亲核试剂(羟基阴离子,具有亲核碳的物质以及通过氢化物离子转移作用的试剂)取代,类似于盐,但收率更高。