作者:Merritt B. Andrus、Tzenge-Lien Shih
DOI:10.1021/jo961686+
日期:1996.1.1
catalytic asymmetric dihydroxylation reaction (AD) of the methoxymethyl (MOM) ether protected diene 2 and a direct Corey-Nicolaou lactonization reaction of seco-acid 1with added silver perchlorate. The selectivity of the dihydroxylation step was found to be highly dependent on the nature of the protecting group adjacent to the diene in 2. The selectivity of the asymmetric dihydroxylation reaction of 2 indicates
合成了Tuckolide(去甲烯丙胺D),一种从P. corylophilum和多孔菌块菌中分离的10元内酯,可有效抑制胆固醇的生物合成。关键步骤包括甲氧基甲基(MOM)醚保护的二烯2的Sharpless催化不对称二羟基化反应(AD)和癸二酸1加高氯酸银的直接Corey-Nicolaou内酯化反应。发现二羟基化步骤的选择性高度依赖于2中与二烯相邻的保护基团的性质。2的不对称二羟基化反应的选择性表明空间和电子效应均可导致大量不期望的反应。异构体。