Anticancer Agents from the Australian Tropical Rainforest: Spiroacetals EBC-23, 24, 25, 72, 73, 75 and 76
作者:Lin Dong、Heiko Schill、Rebecca L. Grange、Achim Porzelle、Jenny P. Johns、Peter G. Parsons、Victoria A. Gordon、Paul W. Reddell、Craig M. Williams
DOI:10.1002/chem.200901525
日期:2009.10.26
EBC‐23, 24, 25, 72, 73, 75 and 76 were isolated from the fruit of Cinnamomum laubatii (family Lauraceae) in the Australiantropicalrainforests. EBC‐23 (1) was synthesized stereoselectively, in nine linear steps in 8 % overall yield, to confirm the reported relative stereochemistry and determine the absolute stereochemistry. Key to the total synthesis was a series of Tietze–Smith linchpin reactions
Synthesis of Aculeatins A and B via Iterative Hydrolytic Kinetic Resolution
作者:Pradeep Kumar、Anand Harbindu
DOI:10.1055/s-0029-1218687
日期:2010.5
A simple and concise approach for the synthesis of aculeatins A and B starting from (+/-)-epichlorohydrin is described. The synthetic strategy features Jacobsen's hydrolytic kinetic resolution and a Linchpin coupling as key steps.
Stereoselective synthesis of bioactive natural spiroacetals aculeatins A and B
The stereoselective synthesis of two naturally occurring bioactive spiroacetals, aculeatins A and B has been accomplished using 1-tetradecanal as the starting material. The sequence introduces diastereoselective iodine-induced electrophilic cyclization and ring opening of epoxide with 1,3-dithiane as the key steps. (C) 2010 Elsevier Ltd. All rights reserved.