An efficient and highly convergent totalsynthesis of the potentantitumor agent phorboxazole B has been achieved. The synthetic strategy of this synthesis features: 1) a highly efficient substrate-controlled hydrogenation to construct the functionalized cis-tetrahydropyrane unit; 2) iterative crotyl addition to synthesize the segment that contains alternating hydroxyl and methyl substituents; 3) Hg(OAc)2/I2-induced
已经实现了有效的和高度收敛的有效的抗肿瘤药phorboxazole B的全合成。该合成方法的合成策略为:1)高效的底物控制的氢化反应,以构建官能化的顺式-四氢吡喃单元;2)重复的巴豆基加成反应,以合成含有交替的羟基和甲基取代基的链段;3)Hg(OAc)2 / I 2诱导的环化以建立顺式-四氢吡喃部分;4)在Mukaiyama aldol反应中的1,3-不对称诱导以在C9和C3处提供立体异构中心;5)探索Still-Gennari烯化反应以完成佛波唑唑B的大环内酯环。
Total synthesis of (−)-decarestrictine D through a stereoselective intramolecular Nozaki-Hiyama-Kishi reaction
作者:Ronaldo A. Pilli、Mauricio M. Victor
DOI:10.1016/s0040-4039(98)00837-5
日期:1998.6
A concisetotalsynthesis of (−)-decarestrictine D (1) from 1,3-propanediol and polyhydroxybutyrate (PHB) is described. The approach involves the stereoselectiveintramolecularNozaki-Hiyama-Kishi coupling to construct the decanolide ring and to set the proper configuration at C-7.
Elaborate fragments of the proposed stereostructure of the complex polyketide antibiotic vancoresmycin have been synthesized in a stereoselective fashion based on a modular and convergent approach. Significant nuclear magnetic resonance differences in one of these subunits compared with the natural product question the proposed stereoconfiguration. Consequently, an extensive bioinformatics analysis
A Dötz benzannulation route to the enantioselective synthesis of (−)- and (+)-juglomycin A
作者:Rodney A. Fernandes、Vijay P. Chavan
DOI:10.1016/j.tetasy.2011.07.018
日期:2011.6
Two synthetic routes based on a Dotz benzannulation toward the enantioselective synthesis of naphthoquinone antibiotics (-)- and (+)-juglomycin A are described. The stereoinducing step is based on asymmetric dihydroxylation. The syntheses are completed in seven to eight steps from Fischer carbene 12. (C) 2011 Elsevier Ltd. All rights reserved.