Stereoselective syntheses of the rhizoxin C(1)C–(9) and C(12)–C(26) subunits
作者:Steven D. Burke、Jian Hong、Andrew P. Mongin
DOI:10.1016/s0040-4039(98)00268-8
日期:1998.4
Stereoselective syntheses of the C(1)-C(9) and C(12)-C(26) subunits of the macrolide antitumor agent rhizoxin are described. Chelation-controlled Ireland-Claisen rearrangement, stereoselective Horner-Wadsworth-Emmons reactions and a thermodynamically-controlled diastereotopic group differentiation are featured. (C) 1998 Elsevier Science Ltd. All rights reserved.
Synthetic Studies of Antitumor Macrolide Rhizoxin: Stereoselective Syntheses of the C(1)−C(9) and C(12)−C(26) Subunits
作者:Steven D. Burke、Jian Hong、Joseph R. Lennox、Andrew P. Mongin
DOI:10.1021/jo980754k
日期:1998.10.1
Horner-Wadsworth-Emmons reaction. The central segment 4 and the oxazole chromophore side chain 3 were coupled using another highlystereoselectiveHorner-Wadsworth-Emmonsreaction. Two different lactone subunits [C(1)-C(9) segment 5 and C(3)-C(10) segment 47] were also prepared, employing a thermodynamically controlled diastereotopic group differentiation tactic for establishing the C(5) stereochemistry