A Synthesis of 3,5-Disubstituted Phenols

A Synthesis of 3,5-Disubstituted Phenols
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DOI:
10.1021/op900322u
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发表时间:
2010-03-01
影响因子:
3.4
通讯作者:
Cooper, Gary F.
Cooper, Gary F.
中科院分区:
化学3区
文献类型:
--
作者:
Davidson, James P.;Sarma, Keshab;Cooper, Gary F.

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提出了一些合成上有用的 3,5-二取代苯酚的稳健且可扩展的合成方法。该过程涉及使用叔丁醇钾和对甲氧基甲苯醇 (PMB-OH) 的预制混合物,通过亲核芳族取代选择性置换卤素,然后在 1,3-二甲氧基苯存在下用酸对 PMB 醚进行脱保护。这些工艺已在公斤级规模上得到验证,可提供高产率和高纯度的结晶酚。
Robust and scalable syntheses of some synthetically useful 3,5-disubstituted phenols are presented. The process involves the selective displacement of a halogen by nucleophilic aromatic substitution using a preformed mixture of potassium tert-butoxide and p-methoxyllenzyl alcohol (PMB-OH), followed by deprotection of the PMB ether with acid in the presence of 1,3-dimethoxybenzene. These processes have been demonstrated on kilogram scale, providing crystalline phenols in good yield and high purity.