Convenient Enantiopure Synthesis of (2S,3R)-2-O-Benzyl-3,4-O-isopropylidene-d-erythritol from d-(+)-Glucono-δ-lactone: A Potential C4 Chiral Building Block
Enantioselective Syntheses of Monotetrahydrofuran Annonaceous Acetogenins Tonkinecin and Annonacin Starting from Carbohydrates
作者:Tai-Shan Hu、Qian Yu、Yu-Lin Wu、Yikang Wu
DOI:10.1021/jo005643b
日期:2001.2.1
The totalsynthesis of two mono-THF acetogenins, tonkinecin (1) and annonacin (2), is reported in full detail. Terminal acetylene 3 prepared from D-glucono-delta-lactone and asymmetric dihydroxylation was employed as a common intermediate for both targets 1 and 2. Pd(0)-catalyzed coupling reaction of 3 with vinyl iodides 4 and 5, the chiral centers of which were taken from D-xylose and S-(-)-ethyl
Stereoselective synthesis of enantiopure 4,5-dihydroxy-2-alkene esters from simple allylic alcohols
作者:Marcel P.M. van Aar、Lambertus Thijs、Binne Zwanenburg
DOI:10.1016/0040-4020(95)00554-l
日期:1995.8
A general stereoselective synthesis of 4.5-dihydroxy-2-alkene esters is developed using the photo-induced rearrangement of α,β-epoxy diazomethyl ketones. Starting with readily available enantiopure allylic alcohols that contain a chiral center at C4, i.e. a protected secondary alcohol function, a neighboring stereogenic center is introduced by irradiation of the mentioned diazo ketones. The configuration
The First Total Synthesis of Annonacin, the Most Typical Monotetrahydrofuran Annonaceous Acetogenins
作者:Tai-Shan Hu、Yu-Lin Wu、Yikang Wu
DOI:10.1021/ol005504g
日期:2000.4.1
The first total synthesis of annonacin (1) was achieved by a highly convergent synthetic strategy. All the stereogenic centers were derived from three natural hydroxy acids respectively, except that those at C19 and C20 were produced from a Sharpless AD reaction.