A Novel Concept for Combinatorial Chemistry in Solution: Synthesis of Highly Substituted Pyrrolidines by Multicomponent Domino Reactions
作者:Lutz F. Tietze、Holger Evers、Enno Töpken
DOI:10.1002/hlca.200290005
日期:2002.12
The multicomponent domino Knoevenagel hetero-DielsAlder hydrogenation process of N-[(benzyloxy)carbonyl(Cbz)-protected amino aldehydes with N,N-dimethylbarbituric acid and the trimethylsilyl enol ethers 1–3 leads to the formation of the substituted pyrrolidines 12–15. Under the same conditions, reaction of the trimethylsilyl enol ether 4, obtained from acetophenone, gave the primary amines 18a,b probably
该多组分多米诺诺文葛耳杂狄尔斯阿尔德的氢化过程ñ - [(苄氧基)羰基(Cbz基)保护的氨基醛类与Ñ,Ñ -dimethylbarbituric酸和三甲基甲硅烷烯醇醚1 - 3个通向取代的吡咯烷的形成12 - 15。在相同条件下,由苯乙酮制得的三甲基甲硅烷基烯醇醚4反应,得到伯胺18a,b可能是由于中间形成的吡咯烷的氢解裂解所致。仅通过用Et 2 O沉淀即可获得高纯度的两性离子产物。