作者:Vince Szabó、János Borbély、Edit Theisz、Sándor Nagy
DOI:10.1016/s0040-4020(01)87646-8
日期:1986.1
The reaction of 4H-1-benzopyran-4-one (chromone, ,) and its substituted derivatives with hydroxylamine in aqueous alcohols gives isoxazoles and , as the major products, whereas is transformed mainly into with hydroxylamine hydrochloride in anhydrous methanol, compounds , and can be also isolated, and the formation of and has been detected, as well. Depending on the character of the substituent, substituted
4H-1-苯并吡喃-4-酮的反应(色酮,,)及其取代的衍生物与羟胺在含水醇给出异恶唑并,作为主要产品,而被变换为主成与在无水甲醇,化合物盐酸羟胺,和也可以分离,并且形成和已被检测到,以及。根据取代基的性质,取代的色得到,或作为可分离的主要产物。根据本实验,在酸催化的甲醇中加成生成的化合物被视为色酮肟形成的关键中间产物。