New Two-Step Synthesis of Azulene-1-carboxylic Esters Using Lithium Trimethylsilyldiazomethane
作者:Toyohiko Aoyama、Yoshiyuki Hari、Shunkichi Tanaka、Yasuta Takuma
DOI:10.1055/s-2003-42064
日期:——
hane successfully reacted with various ethyl or tert-butyl 4-aryl-2-oxobutanoates to yield 2,3-dihydroazulene-1-carboxylic esters via alkylidene carbene intermediates, and the resulting 2,3-dihydroazulenes were easily converted to the corresponding azulene-1-carboxylic esters by oxidation with chemical manganese dioxide.
三甲基甲硅烷基重氮甲烷锂与各种乙基或叔丁基 4-芳基-2-氧代丁酸酯成功反应,通过亚烷基卡宾中间体生成 2,3-二氢茚-1-羧酸酯,所得 2,3-二氢茚烯很容易转化为相应的茚-1-羧酸酯通过化学二氧化锰氧化。