Application of combinatorial biocatalysis for a unique ring expansion of dihydroxymethylzearalenone
摘要:
Combinatorial biocatalysis was applied to generate a diverse set of dihydroxymethylzearalenone analogs with modified ring structure. In one representative chemoenzymatic reaction sequence, dihydroxymethylzearalenone was first subjected to a unique enzyme-catalyzed oxidative ring opening reaction that creates two new carboxylic groups on the molecule. These groups served as reaction sites for further derivatization involving biocatalytic ring closure reactions with structurally diverse bifunctional reagents, including different diols and diamines. As a result, a library of cyclic bislactones and bislactams was created, with modified ring structures covering chemical space and structure activity relationships unattainable by conventional synthetic means. Published by Elsevier Ltd.
MODIFIED PHENOLIC NOVOLAK RESINS AND APPLICATIONS THEREOF
申请人:INDSPEC CHEMICAL CORPORATION
公开号:EP1812487A2
公开(公告)日:2007-08-01
Modified phenolic novolak resins and applications thereof
申请人:Durairaj B. Raj
公开号:US20060069191A1
公开(公告)日:2006-03-30
A modified phenolic novolak resin is prepared by reacting a phenolic compound (e.g., resorcinol) with an aliphatic polyol. The reaction mixture further reacts with a formaldehyde to produce a modified phenolic novolak resin. The reaction is typically carried out in the presence of an acid or a base catalyst. The resulting resin is characterized by a relatively low level of free resorcinol; and rubber compounds containing the resin exhibit low fuming, lower Mooney viscosity (which means better processing), better dynamic stiffness properties (G′), and/or good tear properties. Therefore, the resulting resin can be used as a methylene acceptor compound in a vulcanizable rubber composition.
US7498371B2
申请人:——
公开号:US7498371B2
公开(公告)日:2009-03-03
[EN] MODIFIED PHENOLIC NOVOLAK RESINS AND APPLICATIONS THEREOF<br/>[FR] RESINES NOVOLAQUES PHENOLIQUES MODIFIEES ET LEURS APPLICATIONS
申请人:INDSPEC CHEMICAL CORP
公开号:WO2006036760A2
公开(公告)日:2006-04-06
A modified phenolic novolak resin is prepared by reacting a phenolic compound (e.g., resorcinol) with an aliphatic polyol. The reaction mixture further reacts with a formaldehyde to produce a modified phenolic novolak resin. The reaction is typically carried out in the presence of an acid or a base catalyst. The resulting resin is characterized by a relatively low level of free resorcinol; and rubber compounds containing the resin exhibit low fuming, lower Mooney viscosity (which means better processing), better dynamic stiffness properties (G'), and/or good tear properties. Therefore, the resulting resin can be used as a methylene acceptor compound in a vulcanizable rubber composition.
Application of combinatorial biocatalysis for a unique ring expansion of dihydroxymethylzearalenone
作者:Joseph O. Rich、Cheryl L. Budde、Luke D. McConeghey、Ian C. Cotterill、Vadim V. Mozhaev、Sheo B. Singh、Michael A. Goetz、Annie Zhao、Peter C. Michels、Yuri L. Khmelnitsky
DOI:10.1016/j.bmcl.2009.04.005
日期:2009.6
Combinatorial biocatalysis was applied to generate a diverse set of dihydroxymethylzearalenone analogs with modified ring structure. In one representative chemoenzymatic reaction sequence, dihydroxymethylzearalenone was first subjected to a unique enzyme-catalyzed oxidative ring opening reaction that creates two new carboxylic groups on the molecule. These groups served as reaction sites for further derivatization involving biocatalytic ring closure reactions with structurally diverse bifunctional reagents, including different diols and diamines. As a result, a library of cyclic bislactones and bislactams was created, with modified ring structures covering chemical space and structure activity relationships unattainable by conventional synthetic means. Published by Elsevier Ltd.