H-Bond-Assisted Intramolecular Nucleophilic Displacement of the 1-NMe<sub>2</sub> Group in 1,8-Bis(dimethylamino)naphthalenes as a Route to Multinuclear Heterocyclic Compounds and Strained Naphthalene Derivatives
作者:Maria A. Povalyakhina、Alexander S. Antonov、Olga V. Dyablo、Valery A. Ozeryanskii、Alexander F. Pozharskii
DOI:10.1021/jo201171z
日期:2011.9.2
It has been shown that azomethines, hydrazones, and oximes derived from 2(7)-carbonyl derivatives of 1,8-bis(dimethylamino)naphthalene can undergo acid-catalyzed heterocyclization leading to a nucleophilic displacement of the 1-NMe2 group. The process is believed to be directly connected with the proton sponge nature of the substrates, in which 1-NMe2, being a poor leaving group, is preliminary activated
已经表明,衍生自1,8-双(二甲基氨基)萘的2(7)-羰基衍生物的偶氮甲碱,和肟可以进行酸催化的杂环化作用,从而导致1-NMe 2基团的亲核取代。据信该方法与底物的质子海绵性质直接相关,其中作为不良离去基团的1-NMe 2通过形成螯合的质子化形式而被初步活化。已经以中等至高产率制备了许多难以接近的苯并[ g ]吲唑,苯并[ g ]喹唑啉,萘[2,1- d ]异恶唑和8-二甲基氨基-1-萘酚的衍生物。