A convenient route to α-amino acids with β-alkyne substituents from a serine derived aziridine
作者:John J Turner、Michiel A Leeuwenburgh、Gijs A van der Marel、Jacques H van Boom
DOI:10.1016/s0040-4039(01)01886-x
日期:2001.12
1-[(S)-1-(2-Nitrobenzenesulfonyl)-aziridin-2-yl]-4-methyl-2,6,7-trioxabicyclo[2.2.2]octane 5 was ring opened regioselectively with a variety of lithium acetylides to give α-amino acids bearing γ,δ-unsaturation in very good to excellent yields. The 2-nitrobenzenesulfonyl and OBO ester protecting groups were removed in excellent overall yield.
将1-[(S)-1-(2-硝基苯磺酰基)-叠氮基-2-基] -4-甲基-2,6,7-三恶双环[2.2.2]辛烷5与多种乙炔锂区域选择性地开环可以非常好地获得具有γ,δ-不饱和度的α-氨基酸。以优异的总产率除去了2-硝基苯磺酰基和OBO酯保护基。