An Zhong-wei
2006
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Journal
Fine chemicals
Abstract
Three compounds of 2-fluoro-4-(trans-4-alkylcyclohexyl)phenylboronic acid were synthesized using 1-(trans-4-alkylcyclohexyl)-3-fluorobenzene,n-butyllithium,tributyl borate,and potassium tert-butoxide as reactants,their yields were 52%~56%,and their structures were confirmed by IR and ~1HNMR.The reaction conditions were optimized:n[1-(trans-4-alkylcyclohexyl)-3-fluorobenzene]∶n(potassium tert-butoxide)∶n(n-butyllithium)∶n(tributyl borate)=1∶2∶1.2∶1.5,reaction temperature-85~-90 ℃ and reaction time 2.5 h.The addition of potassium tert-butoxide shortened the reaction time from 7 h to 2.5 h.