Synthetic Studies towards an Advanced Precursor of the Jatrophane Diterpene Pl-4
作者:Uwe Rinner、Rita Fürst、Christoph Lentsch
DOI:10.1055/s-0033-1338565
日期:——
Abstract Jatrophanediterpenes, isolated from members of the Euphorbiaceae plant family, constitute a class of biologically and structurally intriguing natural products. Herein, different strategies for the preparation of an advanced intermediate towards the total synthesis of the jatrophanediterpene Pl-4 are described. Key strategies for the elaboration of the jatrophane precursors include hydrometalation
[GRAPHICS]An effective total synthesis of (-)-callystatin A (1), member of the leptomycin family of antibiotics, has been achieved. The synthesis features Evans extended aldol methodology to construct the northern polypropionate subunit and two separate Julia olefinations to assemble the conjugated dienes. The total synthesis proceeded in 2.3% overall yield with the longest linear sequence of 15 steps.
A synthesis of (−)-ebelactones A and B
作者:John P. Cooksey、Rhonan Ford、Philip J. Kocieński、Beatrice Pelotier、Jean-Marc Pons
DOI:10.1016/j.tet.2010.05.072
日期:2010.8
A synthesis of the beta-lactone esterase inhibitors (-)-ebelactones A and B is described. The synthesis features the use of a Hoppe homoaldol reaction and a Cu(I)-mediated 1,2-metallate rearrangement of a metallated enol carbamate as key fragment linkage reactions. (C) 2010 Elsevier Ltd. All rights reserved.