Electrochemical Deprotection of <i>para</i>-Methoxybenzyl Ethers in a Flow Electrolysis Cell
作者:Robert A. Green、Katherine E. Jolley、Azzam A. M. Al-Hadedi、Derek Pletcher、David C. Harrowven、Oscar De Frutos、Carlos Mateos、David J. Klauber、Juan A. Rincón、Richard C. D. Brown
DOI:10.1021/acs.orglett.7b00641
日期:2017.4.21
undivided electrochemical flow reactor in MeOH solution, leading to the unmasked alcohol and p-methoxybenzaldehyde dimethyl acetal as a byproduct. The electrochemical method removes the need for chemical oxidants, and added electrolyte (BF4NEt4) can be recovered and reused. The method was applied to 17 substrates with high conversions in a single pass, yields up to 92%, and up to 7.5 g h–1 productivity. The
对-甲氧基苄基(PMB)醚的电化学脱保护是在未分开的电化学流动反应器中的MeOH溶液中进行的,从而产生未掩蔽的醇和对甲氧基苯甲醛二甲基乙缩醛的副产物。电化学方法消除了对化学氧化剂的需求,并且可以回收和再利用添加的电解质(BF 4 NEt 4)。该方法一次通过即可应用于高转化率的17种基材,产率高达92%,生产率高达7.5 gh –1。在一些其他常见的醇保护基的存在下,也选择性地除去了PMB保护基。