Synthesis of 9,9-bis(4-hydroxyphenyl) fluorene catalyzed by bifunctional ionic liquids,RSC Advances

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Synthesis of 9,9-bis(4-hydroxyphenyl) fluorene catalyzed by bifunctional ionic liquids
RSC Advances ( IF 3.9 ) Pub Date : 2021-10-04 , DOI: 10.1039/d1ra05967j
Jialun Wei ₁ , Limei Yu _{1,

2} , Lei Yan ₁ , Wei Bai ₁ , Xinxin Lu ₁ , Zhanxian Gao _{1,

2}

Affiliation

Through structural design, a series of bifunctional ionic liquids (BFILs) containing sulfonic acid (–SO₃H) and sulfhydryl groups (–SH) were synthesized and characterized by NMR and MS. The acidity of these BFILs was measured by the Hammett acidity (H₀) and the effective sulfhydryl molar content of BFILs was determined by Ellman's method. Moreover, BFIL's catalytic properties in the condensation reaction of 9-fluorenone and phenol were studied. BFIL catalyst 6c can achieve nearly 100% conversion of 9-fluorenone with a high selectivity of 9,9-bis(4-hydroxyphenyl) fluorene (95.2%).

中文翻译：

双功能离子液体催化合成9,9-双(4-羟基苯基)芴

通过结构设计，合成了一系列含有磺酸（-SO ₃ H）和巯基（-SH）的双功能离子液体（BFIL），并通过NMR和MS对其进行了表征。通过哈米特酸度( H ₀ )测量这些BFIL的酸度，并且通过Ellman法测定BFIL的有效巯基摩尔含量。此外，还研究了BFIL在9-芴酮与苯酚缩合反应中的催化性能。 BFIL催化剂6c可以实现9-芴酮近100%的转化率，并且9,9-双(4-羟基苯基)芴的选择性很高(95.2%)。

更新日期：2021-10-04

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