Microwave Assisted Rapid Preparation of N-Alkyl-2-pyridones under Neutral Conditions by Hilbert-Johnson Reaction
作者:Hirokazu Iida、Hiroshi Hamana、Machiko Suda、Etsuko Nakajima、Hiroko Hakamatsuka、Yuka Nagashima、Kouta Joho、Kiyoshi Matsumoto、Yasuoki Murakami
DOI:10.3987/com-10-12006
日期:——
The reactions of 2-methoxypyridine with haloalkanes without solvent and catalyst under microwave irradiation (100-200 degrees C, 5 min) yielded the corresponding N-alkyl-2(1H)-pyridones in good to moderate yields. However, the reactions were sensitive to length of haloalkanes. In contrast, the reactions of 2-alkoxypyridines with corresponding iodoalkanes under microwave irradiation (150 degrees C) proceeded rapidly without catalyst and solvent, and were complete within 5 min to afford N-alkyl-2(1H)-pyridones in good to excellent yields.