Toward a 6π+6π Zwitterion or a Bioinhibitors-Related OH-Substituted Aminoquinone: Identification of a Key Intermediate in Their pH Controlled Synthesis
作者:Pierre Braunstein、Olivier Siri、Jean-philippe Taquet、Qing-Zheng Yang
DOI:10.1002/chem.200400244
日期:2004.8.6
Their pH-controlled reactivity places the N,N'-dialkyl-2-amino-5-lithium alcoholate-1,4-benzoquinonemonoimines [C(6)H(2)(NHCH(2)R') (=NCH(2)R')(=O)(OLi)] 7 (R'=tBu) and 8 (R'=p-C(6)H(4)-tBu) at the crossroads of a new versatile strategy for the preparation of two very different classes of substituted quinones. We describe new 2-(N-alkyl)amino-5-hydroxy-1,4-benzoquinones, which are parent molecules