The First Synthesis of Tonkinecin, an Annonaceous Acetogenin with a C-5 Carbinol Center
摘要:
[GRAPHICS]Reported herein is the first synthetic approach to tonkinecin (1) which uses a palladium catalyzed cross-coupling reaction between the tetrahydrofuran unit (4) and the butenolide (3) as the key step for constructing the backbone of 1, The stereogenic centers at C-5, C-21, C-22, and C-36 were derived from D-xylose, D-glucose, and L-lactate, respectively, whereas those at C-17, and C-18 were generated using Sharpless asymmetric dihydroxylation.
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
The First Synthesis of Tonkinecin, an Annonaceous Acetogenin with a C-5 Carbinol Center
作者:Tai-Shan Hu、Qian Yu、Qi Lin、Yu-Lin Wu、Yikang Wu
DOI:10.1021/ol990062y
日期:1999.8.1
[GRAPHICS]Reported herein is the first synthetic approach to tonkinecin (1) which uses a palladium catalyzed cross-coupling reaction between the tetrahydrofuran unit (4) and the butenolide (3) as the key step for constructing the backbone of 1, The stereogenic centers at C-5, C-21, C-22, and C-36 were derived from D-xylose, D-glucose, and L-lactate, respectively, whereas those at C-17, and C-18 were generated using Sharpless asymmetric dihydroxylation.