作者:Dae-Kee Kim、Ganghyeok Kim、Jinsoo Lim、Key H. Kim
DOI:10.1002/jhet.5570320536
日期:1995.9
1-Alkoxy-5-alkyluracils 2a-f have been prepared by the reaction of 2-alkyl-3-methoxyacryloyl isocyanates 8a-b with alkoxyamines 9a-c followed by cyclization of the resulting N-alkoxy-N'-(2-alkyl-3-methoxyacryloyl)ureas 10a-f. The isocyanates 8a-b were prepared from ethyl 2-alkylacrylates 3a-b in 5 steps.
Copper(i) mediated cross-coupling of amino acid derived organozinc reagents with acid chlorides
作者:Thomas Hjelmgaard、David Tanner
DOI:10.1039/b601996j
日期:——
copper-mediated cross-coupling of aminoacid derived beta-amido-alkylzinc iodides 1 and 3 with a range of acidchlorides. The present method uses CuCN.2LiCl as the copper source and for organozinc reagent 1 the methodology appears to be limited to reaction with more stable acidchlorides, providing the desired products in moderate yields. When applied to organozinc reagent 3, however, the protocol is more