A Catalytic Enantioselective Hetero Diels−Alder Approach to the C20−C32 Segment of the Phorboxazoles
作者:Brian S. Lucas、Laura M. Luther、Steven D. Burke
DOI:10.1021/jo050034v
日期:2005.4.1
An efficient synthesis of the C20−C32 segment of the phorboxazoles has been achieved using an enantioselective hetero Diels−Alderreaction catalyzed by Jacobsen's Cr(III) amino indanol Schiff base catalyst.
Toward the Total Synthesis of Phorboxazole B: An Efficient Synthesis of the C20−C46 Segment
作者:De Run Li、Cai Yun Sun、Ce Su、Guo-Qiang Lin、Wei-Shan Zhou
DOI:10.1021/ol048275x
日期:2004.11.1
An efficient synthesis of the C20-C46 segment of phorboxazole B is described. The key steps involved Hg(OAc)(2)/I(2)-induced cyclization to construct the cis-tetrahydropyran moiety, the coupling of the metalated 2-methyloxazole 7 with lactone 6, and Julia olefination to furnish the conjugated diene moiety.
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。
In search of constrained FTY720 and phytosphingosine analogs as dual acting anticancer agents targeting metabolic and epigenetic pathways
作者:Jean-Baptiste Garsi、Lorenzo Sernissi、Vito Vece、Stephen Hanessian、Alison N. McCracken、Grigor Simitian、Aimee L. Edinger
DOI:10.1016/j.ejmech.2018.09.043
日期:2018.11
compounds containing pyrrolidine and pyrrolizidine cores with appended hydrophobic substituents were prepared as constrained analogs of FTY720 and phytosphingosine. The effect of these compounds on the viability of cancer cells, on downregulation of the nutrient transport systems, and on their ability to cause vacuolation was studied. An attempt to inhibit HDACs with some phosphate esters of our analogs