A Convenient Conversion of <i>α</i>-Aminoacids into NH-Boc Protected <i>α</i>-Aminoketones <i>via</i> Imidazolides
作者:Bianca F. Bonini、Mauro Comes-Franchini、Mariafrancesca Fochi、Germana Mazzanti、Alfredo Ricci、Greta Varchi
DOI:10.1055/s-1998-1831
日期:1998.9
Imidazolides obtained from natural α-aminoacids react with a twofold excess of Grignard reagents to afford in satisfactory to good yields the corresponding NH-Boc protected α-aminoketones. Under optimized conditions the reaction with phenyl- and n-pentylmagnesium bromide required the addition of catalytic amounts of Cu(I)-salt which turned out to be unnecessary in the case of Buchi's Grignard.
从天然α-氨基酸获得的咪唑酯与过量的格氏试剂反应,以满意的至良好的产率得到相应的NH-Boc保护的α-氨基酮。在优化条件下,与苯基和正戊基溴化镁反应需要加入催化量的Cu(I)盐,而在Buchi的格氏试剂情况下则不需要。