An efficient catalytic reductive amination: A facile one-pot access to 1,2-dihydropyrrolo[3,4-b]indol-3(4H)-ones by using B(C 6 F 5 ) 3 /NaBH 4
作者:ATULYA NAGARSENKAR、SANTOSH KUMAR PRAJAPTI、BATHINI NAGENDRA BABU
DOI:10.1007/s12039-015-0825-y
日期:2015.4
to afford 1,2-dihydropyrrolo[3,4-b]indol-3(4H)-ones. An efficient combination of B(C6F5)3 and NaBH4 was developed for direct reductive amination of aldehydes. In addition, B(C6F5)3 catalyzed tandem amination–amidation of 3-formyl-indole-2-carboxylic acids with different substituted anilines to afford substituted 1,2-dihydropyrrolo[3,4-b]indol-3(4H)-ones.
开发了B(C 6 F 5)3和NaBH 4的有效组合,用于醛的直接还原胺化。容许多种官能团,例如酯,硝基,腈,卤素,烯烃,杂环。而且,酸敏感性保护基如TBDMS和TBDPS不受影响。另外,本方法扩展到3-甲酰基-吲哚-2-羧酸与取代的苯胺的串联胺化反应,得到1,2-二氢吡咯并[3,4-b]吲哚-3(4H)- 。 开发了B(C 6 F 5)3和NaBH 4的有效组合,用于醛的直接还原胺化。另外,B(C 6 F 5)3催化3-甲酰基-吲哚-2-羧酸与不同取代的苯胺的串联胺化反应,得到取代的1,2-二氢吡咯并[3,4-b]吲哚-3( 4 H)-一。