作者:Thierry Jousseaume、Pascal Retailleau、Laurent Chabaud、Catherine Guillou
DOI:10.1016/j.tetlet.2012.01.008
日期:2012.3
The asymmetric Birch reductive alkylation has been investigated to synthesize spiroimine analogs of the neurophycotoxin (−)-gymnodimine A 1. Two types of chiral aromatic substrates, an acyclic benzamide 2 and a benzoxazepinone 3 were studied. We found that the chiral auxiliary of benzoxazepinone could be easily removed in a three step procedure to afford β-ketoester 14 that was converted into spiroimines
已经研究了不对称的桦木还原性烷基化反应以合成神经藻毒素(-)-gymnodimine A 1的螺胺类似物。研究了两种类型的手性芳族底物,无环苯甲酰胺2和苯并a庚酮3。我们发现,benzoxazepinone的手性助剂可以三步过程,得到β酮酯中被容易地移除14,将其转变成spiroimines 23 - 24个具有上烟碱乙酰胆碱受体(nAChRs)拮抗剂作用。