B–O–B Catalyzed Cycloadditions of Acrylic Acids

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• 作者：Peng Zhang ; Robert M. Kriegel ; John W. Frost
• 刊名：ACS Sustainable Chemistry & Engineering
• 出版年：2016
• 出版时间：December 5, 2016
• 年：2016
• 卷：4
• 期：12
• 页码：6991-6995
• 全文大小：349K
• ISSN：2168-0485

文摘

Lewis-acid-catalyzed cycloadditions of unesterified acrylic acids performed under solvent-free reaction conditions can be environmentally advantageous and afford increased product yields. However, there is also the potential for competing Lewis-acid-catalyzed polymerization reactions and the attendant fire/explosion risks associated with runaway polymerizations. BOB(OAc)₄ (tetraacetyl diborate) and BOBPh₄ (diphenylborinic anhydride), which are distinguished by an oxygen bonded to two boron atoms (B–O–B), catalyze high-yielding cycloadditions of unesterified acrylic acids under solvent-free reaction conditions without competing olefin polymerization.