Citation:
HE Quan-Guo, LIU Zheng-Chun, ZHOU Ling-Jun, HE Nong-Yue, YANG Chun, LU Zu-Hong. Synthesis of Piperonol from Catechol[J]. Chinese Journal of Applied Chemistry,
;2003, 20(3): 281-283.
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A facile synthesis of piperonol is reported from catechol. Reacted catechol with excess dichloromethane in an autoclave under nitrogen atmosphere gave 88.4% 1,3-benzodioxole (1), which is directly chloromethylated to yield 90.1% 5-chloromethyl 1,3-benzodioxole (2) by hydrogen chloride saturated triformol. 2 can easily convert to piperonal by treatment with alcoholic solution of Na2CO3 in yield of 97.7%. The total yield is 78%.
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