作者:R. N. Butler、P. O'Sullivan、F. L. Scott
DOI:10.1039/j39710002265
日期:——
In the reaction of benzothiazolylhydrazones of some aromatic aldehydes with lead tetra-acetate the presence of a sulphur atom in the potential cyclisation site of the heteroaryl moiety inhibits the cyclisation reaction. Thus, the reaction of substituted benzothiazolylhydrazones involves an acetoxylation of the hydrazone and not a cyclisation reaction as had previously been reported. Cyclisation of
在一些芳族醛的苯并噻唑基hydr唑酮与四乙酸铅的反应中,杂芳基部分的潜在环化位点中硫原子的存在抑制了环化反应。因此,取代的苯并噻唑基hydr唑酮的反应涉及the的乙酰氧基化,而不是先前报道的环化反应。does环化成三唑并苯并噻唑部分的确是次要的竞争过程。已经开发了一种将乙酰氧基化产物转化为环化三唑并苯并噻唑的简便方法,从而克服了在苯并噻唑系列中使用四乙酸铅-hydr反应的最严重的局限性。