A Novel Base Promoted Reaction of Methyl 2-Isoxazoline-5-acetates to 5-(2-oxoethyl)-3-isoxazolidinones
摘要:
The 5-(2-aryl-2-oxoethyl)-3-isoxazolidinones 3a-e were prepared from the methyl 3-aryl-2-isoxazoline-5-acetates 2a-e and sodium hexanolate in boiling hexanol in yields from 46 to 86%. The reaction conditions were optimized and a mechanism for this reaction is proposed and discussed.
A Convenient Synthesis of 3- and 3,4-Substituted 4,5-Dihydroisoxazole-5-Acetic Acids
摘要:
The 4,5-dihydroisoxazole-5-acetic acids 4a-j were prepared from the ketoximes 1a-j, 2,2-dimethyl-5-methoxymethylene-1,3-dioxan-4,6-dione (2) and butyllithium in yields from 35 to 79%.