One-pot oxidative hydrolysis-oxidative cleavage of 7-borylindoles enables access to <i>o</i>-amidophenols and 4-acylbenzoxazoles
作者:Kirsty Anderson、Andrew S. Eastabrook、Jonathan Sperry
DOI:10.1039/c9cc09807k
日期:——
o-amidophenol derivatives. Subsequent cyclisation delivers benzoxazoles bearing an acyl group at C4, a substitution pattern common to fungal-derived benzoxazole alkaloids. Using 7-borylindoles as substrates to access functionalised o-amidophenols circumvents the difficult preparation of these compounds from arenes, streamlining access to substituted 4-acylbenzoxazoles in the process.
7-Borylindoles进行芳基硼酸酯的一锅氧化水解和吲哚C2-C3双键的氧化裂解,得到邻氨基苯酚衍生物。随后的环化作用将生成在C4处带有酰基的苯并恶唑,这是真菌衍生的苯并恶唑生物碱所共有的取代模式。使用7-硼基吲哚作为底物来获得官能化的邻氨基苯酚,可以避免从芳烃制备这些化合物的困难,简化了该方法中对取代的4-酰基苯并恶唑的获取。