A Convenient One-Pot Synthesis of 4-Substituted 3,5-Bis(alkoxycarbonyl) -4,5-dihydroisoxazole 2-Oxides from Aldehydes and Nitroacetic Esters in a Solid-Liquid Reaction System and Subsequent Deoxygenation
CHO, BONG RAE;MAENG, JUN HO;YOON, JONG CHAN;KIM, TAE RIN, J. ORG. CHEM., 52,(1987) N 21, 4752-4756
作者:CHO, BONG RAE、MAENG, JUN HO、YOON, JONG CHAN、KIM, TAE RIN
DOI:——
日期:——
Microwave-assisted diastereoselective two-step three-component synthesis for rapid access to drug-like libraries of substituted 3-amino-β-lactams
作者:Guido V. Janssen、Joyce A.C. van den Heuvel、Rik P. Megens、Jorg C.J. Benningshof、Huib Ovaa
DOI:10.1016/j.bmc.2017.11.014
日期:2018.1
a robust microwave-assisted synthesis for the diastereoselective generation of 3-saccharinyl-trans-β-lactams is reported. The method is optimised for combinatorial library synthesis in which decoration of the scaffold is varied on both the β-lactam and the saccharine moiety. Within the European Lead Factory (ELF) consortium, a library of 263 compounds was efficiently produced using the developed methodology
A Convenient One-Pot Synthesis of 4-Substituted 3,5-Bis(alkoxycarbonyl) -4,5-dihydroisoxazole 2-Oxides from Aldehydes and Nitroacetic Esters in a Solid-Liquid Reaction System and Subsequent Deoxygenation
4-Substituted 3,5-bis(alkoxycarbonyl)-4,5-dihydroisoxazole 2-oxides are obtained from nitroacetic esters and imines which are prepared from aldehydes and isopropylamine in the presence of molecular sieves. Reduction of the N-oxides with trimethyl phosphite in dioxane gives the corresponding 4,5-dihydroisoxazoles in good yields.