Chiral aziridination of α,β-unsaturated esters and ketones using N-nitrenes in the presence of trifluoroacetic acid
作者:Robert S. Atkinson、Gary Tughan
DOI:10.1039/c39870000456
日期:——
temperature oxidations of the N-aminoquinazolone (1) in dichloromethane containing trifluoroacetic acid (TFA) in the presence of α,β-unsaturated esters or ketones gave aziridines with modest to high stereoselectivities; the presence of TFA allows these oxidations to be carried out at –60 °C with the expected improvement in selectivity and in the presence of ca. 1 mol. equiv. of alkene.
在α,β-不饱和酯或酮存在下,在含三氟乙酸(TFA)的二氯甲烷中室温氧化N-氨基喹唑酮(1),得到氮丙啶具有中等至高的立体选择性;TFA的存在可以使这些氧化反应在–60°C的条件下进行,且选择性得到预期的提高,并且存在ca。1摩尔 当量 烯烃。