Synthetic and mechanistic investigation of piperonyl butoxide from dihydrosafrole
作者:Shuai Wang、Jinqiang Liu、Chao Qian、Xinzhi Chen
DOI:10.1007/s11164-011-0333-8
日期:2012.1
during the chloromethylation of 3, several by-products such as 5 (the isomer of chloromethyldihydrosafrole 4), 6-propylpiperonyl alcohol 6, bis(chloromethyl)-dihydrosafrole 7 and 8, bis(2-propyl-4,5-methylenedioxyphenyl)methane 9 and di(2-propyl-4,5-methy lene-dioxybenzyl)ether 10 were found. However, it was found that 5, 6, 7, and 8 could undergo a further reaction to the final product (PBO), rather than
经由连续的甲基二氢黄樟脑3的氯甲基化和醚化反应,制得了丁基丁烯醚(PBO)1。在这项工作中,在3的氯甲基化过程中,有几种副产物,例如5(氯甲基二氢黄樟脑的异构体4),6-丙基戊醇6,双(氯甲基)-二氢黄樟脑7和8,双(2-丙基-4,5发现了-亚甲基二氧苯基)甲烷9和二(2-丙基-4,5-甲基-二氧苄基)醚10。然而,人们发现,5,6,7,和8尽管副产物9和10仍然存在,但它可能会与最终产物(PBO)而不是其衍生物发生进一步反应。基于这些结果,提出了3的氯甲基化和醚化的合理机理。此外,通过使用DFT的量子化学计算,验证了该合理机理的可靠性。另外,通过减少副产物9和10,以高的选择性和产率生产了最终产物(PBO)。