Ethyl α-Nitrocinnamates in the Synthesis of Highly Functionalized Isoxazoles
作者:Kuang-Po Chen、Yu-Jyun Chen、Che-Ping Chuang
DOI:10.1002/ejoc.201000401
日期:2010.9
An effective method for the synthesis of highlyfunctionalizedisoxazoles from readily available starting ethylα-nitrocinnamates has been developed. Ethylα-nitrocinnamates react smoothly with α-nitro carbonyl compounds to produce isoxazoles in good yields. Michael addition of pyridinium ylides to ethylα-nitrocinnamates can also produce these isoxazoles effectively. These pyridinium salts can be
Divergent synthesis of polysubstituted isoxazoles, isoxazoline N-oxides, and dihydroisoxazoles by a one-pot cascade reaction
作者:Abdul Rouf、Ertan Şahin、Cihangir Tanyeli
DOI:10.1016/j.tet.2016.12.005
日期:2017.1
efficient one-pot synthesis of a new class of 3,4,5-trisubstituted isoxazoline N-oxides/isoxazoles and dihydroisoxazoles is developed by a green approach from aromatic and aliphatic aldehydes by controlling the reaction conditions. Aldehydes were reacted with ethyl nitroacetate in the presence of DABCO as a catalyst under ultrasonication. In aromatic aldehydes, isoxazoline N-oxides were obtained exclusively