A novel and facile synthesis of 7,8-diacylcoumarins
作者:Antigoni Kotali、Ioannis S. Lafazanis、Philip A. Harris
DOI:10.1016/j.tetlet.2007.07.202
日期:2007.10
Oxidation of N-carbonylhydrazones of 7-liydroxy-8-acetylcoumarin with lead tetraacetate results in the synthesis of 7,8-diacylcoumarins in good yields. The reaction proceeds via the transformation of a hydroxy into an acyl group reported for the first time in heterocyclic chemistry. (C) 2007 Elsevier Ltd. All rights reserved.
METHOD FOR PRODUCING POLYDIENES AND POLYDIENE COPOLYMERS WITH REDUCED COLD FLOW
申请人:Bridgestone Corporation
公开号:US20140187725A1
公开(公告)日:2014-07-03
A method for preparing a coupled polymer, the method comprising the steps of: (i) polymerizing monomer to form a reactive polymer, and (ii) reacting the reactive polymer with coumarin or a substituted coumarin compound.
US9127092B2
申请人:——
公开号:US9127092B2
公开(公告)日:2015-09-08
Synthesis of Angular 7,8-Pyridazinocoumarins
via the Transformation of a Hydroxy Group into a Carbonyl Group
angular 7,8-pyridazinocoumarins (2H-pyrano[2,3-f]phthalazin-2-ones) is reported via the oxidation of 8-[1-(acylhydrazono)ethyl]-7-hydroxycoumarin with (diacetoxyiodo)benzene and subsequent treatment of the derived 7,8-diacylcoumarins with hydrazine. The procedure involves transformation of a hydroxygroup into an acyl group and formation of a new C-C bond. transformation - oxidation - (diacetoxyiodo)benzene
据报道,通过将8- [1-(酰基肼基)乙基] -7-羟基香豆素与(二乙酰氧基碘)氧化,合成了有角的7,8-吡啶并香豆素(2 H-吡喃并[2,3 - f ]酞嗪-2-酮)。 )苯并随后用肼处理衍生的7,8-二酰基香豆素。该过程涉及将羟基转化为酰基并形成新的CC键。 转化-氧化-(二乙酰氧基碘)苯-2 H-吡喃并[2,3- f ]酞嗪-2-酮-角哒嗪香豆素-N-酰基hydr