Improved Synthesis of Racemate and Enantiomers of Taniguchi Lactone and Conversion of Their C–C Double Bonds into Triple Bonds
作者:Friedrich Hammerschmidt、Petra Malová Križková、Wolfgang Lindner
DOI:10.1055/s-0036-1591516
日期:2018.2
Taniguchi lactone. It was converted into diastereomeric amides with (S)-1-phenylethylamine for stereoisomer resolution. The double bonds of (±)-, (R)- and (S)-Taniguchi lactones were brominated and dehydrobrominated in two steps, using at first DBU and then LDA, to deliver the triple bonds. cis-2-Butene-1,4-diol was heated with triethyl orthoacetate and p-hydroquinone as catalyst at 170 °C to give racemic
摘要 将顺式-2-丁烯-1,4-二醇与原乙酸三乙酯和对氢醌作为催化剂在170°C下加热,得到外消旋的谷口内酯。用(S)-1-苯乙胺将其转化为非对映体酰胺,用于拆分立体异构体。(±)-,(R)-和(S)-谷口内酯的双键分两步进行溴化和脱氢溴化,首先使用DBU,然后使用LDA,以递送三键。 将顺式-2-丁烯-1,4-二醇与原乙酸三乙酯和对氢醌作为催化剂在170°C下加热,得到外消旋的谷口内酯。用(S)-1-苯乙胺将其转化为非对映体酰胺,用于拆分立体异构体。(±)-,(R)-和(S)-谷口内酯的双键分两步进行溴化和脱氢溴化,首先使用DBU,然后使用LDA,以递送三键。