Catalytic asymmetric synthesis of butane diacetal-protected (4S,5S)-dihydroxycyclohexen-1-one and use in natural product synthesis
作者:David J. Burns、Shuji Hachisu、Peter O'Brien、Richard J. K. Taylor
DOI:10.1039/c2ob26406d
日期:——
Due to the lack of availability of unnatural (+)-quinic acid as a starting material, a 6-step synthesis of butane diacetal-protected (4S,5S)-dihydroxycyclohexen-1-one (formally derived from (+)-quinic acid) has been devised. The key catalytic asymmetric step involves a chiral Co-salen-catalysed epoxide ring-opening reaction. (4S,5S)-Dihydroxycyclohexen-1-one was utilised in the synthesis of two cyclohexenone natural products isolated from the mycelia of Lasiodiplodia theobromae.
由于缺乏非天然 (+)-奎尼酸作为起始原料,丁烷二缩醛保护的 (4S,5S)-二羟基环己烯-1-酮(正式衍生自 (+)-奎尼酸)的 6 步合成)已被设计出来。关键的催化不对称步骤涉及手性Co-salen催化的环氧化物开环反应。 (4S,5S)-二羟基环己烯-1-酮用于合成从 Lasiodiplodia theobromae 菌丝体中分离的两种环己烯酮天然产物。