Regioselective Synthesis of Benzo[<i>h</i>][1,6]-naphthyridines and Chromenopyrazinones through Alkyne Cyclization
作者:Emre Hoplamaz、Selbi Keskin、Metin Balci
DOI:10.1002/ejoc.201601661
日期:2017.3.17
An efficient and regioselective method has been developed for the synthesis of benzo[h][1,6]‐naphthyridine and chromenopyrazinone derivatives. Intramolecular Diels–Alder reaction between a triple bond and an azadiene unit gave the desired skeletons.
已开发出一种有效的区域选择性方法,用于合成苯并[ h ] [1,6]-萘啶和色并吡嗪酮衍生物。三键和氮杂二烯单元之间的分子内Diels-Alder反应可得到所需的骨架。
Synthesis of Tricyclic Aromatic Compounds by the Intramolecular Pauson−Khand Reaction Promoted by Molecular Sieves<sup>,</sup><sup>1</sup>
Pauson-Khandreactions are carried out with different substituted aromatic enynes, yielding tricyclic cyclopentenones related to natural products such as chromenes. Enynes are easily obtained in a two-step approximation from the corresponding salicylaldehydes. The reaction is promoted by dissolved TMANO (trimethylamine N-oxide) and/or 4 A molecular sieves. This new way of induction for the Pauson-Khand