Condensation of 9-fluorenone and phenol using an ionic liquid and a mercapto compound synergistic catalyst. (19th September 2019)

• Record Type: Journal Article
• Authors: Lei, Yan; Yu, Limei; Shen, Maochang; Luo, Shikang; Gao, Zhanxian
• Is Part Of: New journal of chemistry. Volume 43:Number 39(2019)
• Page Start: 15700
• Page End: 15705
• Publication Date: 2019-09-19
• Subjects: Chemistry -- Periodicals; Chimie -- Périodiques; 540
• DOI: 10.1039/c9nj02581b
• Languages: English
• ISSNs: 1144-0546

Abstract

Abstract : A SO3 H-functionalized ionic liquid and thiol co-catalyst synergistically catalyze the condensation reaction of 9-fluorenone with phenol. Abstract : A series of ionic liquids (ILs) were synthesized and their Hammett acidities ( H 0 ) were determined using 4-nitroaniline as the indicator. The relationship among IL's structure, the acid strength, and the catalytic performance in the condensation reaction of 9-fluorenone with phenol was discussed. The effective H 0 range of ionic liquids that can catalyse the condensation reaction was obtained. Moreover, the catalysis of the mercapto compound co-catalyst was also systematically studied. According to the analysis of how the structure of the sulfydryl co-catalyst affects the percent conversion of 9-fluorenone and the selectivity of BHPF, a mechanism for the reaction in the IL–thiol cooperative catalytic system was proposed. The present work gave a clear clue to design novel IL catalysts for the synthesis of BHPF.