作者:Beneteau, Valerie、Meth-Cohn, Otto、Rees, Charles W.
DOI:10.1039/b108402j
日期:2001.12.11
Several of the title compounds Cn are known to be available by cyclisation of the linear precursors with acetone and hydrochloric acid. A two-step synthesis of these linear precursors, Ln, with n
= 4–9, and thus potentially of the title compounds, has been developed involving: (i) synthesis of the corresponding mono- or di-ketones from lithiofurans and tertiary amides; and (ii) gem-dimethylation at the keto group(s) using titanium tetrachloride and dimethylzinc.
标题化合物的几种形式Cn可以通过线性前体的环化与丙酮和盐酸反应制得。已开发出一种两步法合成这些线性前体Ln(n = 4–9),从而可能合成标题化合物,包括:(i)从锂杂呋喃和三级酰胺合成相应的单或双酮;(ii)使用四氯化钛和二甲基锌对酮基进行顺二甲基化。