Asymmetric synthesis of vicinal amino alcohols: xestoaminol C, sphinganine and sphingosine
作者:Elin Abraham、Stephen G. Davies、Nicholas L. Millican、Rebecca L. Nicholson、Paul M. Roberts、Andrew D. Smith
DOI:10.1039/b801357h
日期:——
beta-unsaturated esters, via conjugate addition of lithium (S)-N-benzyl-N-(alpha-methylbenzyl)amide and subsequent in situ enolate oxidation with (+)-(camphorsulfonyl)oxaziridine, has been used as the key step in the asymmetric synthesis of N,O-diacetyl xestoaminol C (41% yield over 8 steps), N,O,O-triacetyl sphinganine (30% yield over 8 steps) and N,O,O-triacetyl sphingosine (30% yield over 7 steps)
通过共轭添加(S)-N-苄基-N-(α-甲基苄基)酰胺锂并随后用(+)-(樟脑磺酰基)氧杂氮丙啶原位烯醇氧化,对α,β-不饱和酯进行高度非对映选择性的抗氨基羟化反应用作非对称合成N,O-二乙酰基异丁烯醇C(8步中产率为41%),N,O,O-三乙酰基鞘氨醇(8步中产率为30%)和N,O的关键步骤O-三乙酰基鞘氨醇(7步收率30%)。