Application of the hurd-mori-reaction for the synthesis of tricyclic annelated 1,2,3-thiadiazoles
作者:Peter Stanetty、Manfred Kremslehner、Martin Müllner
DOI:10.1002/jhet.5570330635
日期:1996.11
The synthesis of methyl naphtho[1,2-d][1,2,3]thiadiazole-4-carboxylate 1a as well as the corresponding thienobenzo[1,2,3]thiadiazoles 1b and 1c is reported using the Hurd-Mori reaction in the key step. Treatment of the readily available tosylhydrazones 10a-c with thionyl chloride surprisingly affords the fully aromatic products 1a-c, instead of the expected annelated 4,5-dihydro[1,2,3]thiadiazoles
据报道,使用Hurd-Mori反应合成了萘并[1,2- d ] [1,2,3]噻二唑-4-羧酸甲酯1a以及相应的噻吩并[1,2,3]噻二唑1b和1c。在关键步骤中。用亚硫酰氯处理易于得到的甲苯磺酰1010a -c令人惊奇地得到完全芳族的产物1a-c,而不是预期的退火的4,5-二氢[1,2,3]噻二唑2a-c。基于这些结果,提出了用亚硫酰氯进行芳构化步骤的机理。