Synthetic Approaches to Rapamycin: Synthesis of a C10-C26 Fragment via a One-Pot Julia Olefination Reaction
作者:Richard Bellingham、Krzysztof Jarowicki、Philip Kocienski、Valerie Martin
DOI:10.1055/s-1996-4184
日期:1996.2
Key steps in a synthesis of the C10-C26 fragment of the immunosuppressant Rapamycin include (a) the use of a metallated benzothiazolyl sulfone in a one-pot Julia olefination to create the C21-C22 alkene stereoselectively and (b) a diastereoselective acid-catalysed cyclisation of a hydroxyl function onto a ketenedithioacetal (1,4-asymmetric induction) in order to create the oxane ring and fix the stereochemistry at C11.
Cyclization Reactions of Anode-Generated Amidyl Radicals
作者:Hai-Chao Xu、John M. Campbell、Kevin D. Moeller
DOI:10.1021/jo402623r
日期:2014.1.3
Amidylradicals have been generated from amides under mild conditions electro-oxidatively. Their reactivity toward electron-rich double bonds to form five- and six-membered rings has been demonstrated experimentally and explored with density functional theory (DFT) calculations (UB3LYP/6-31G(d,p)).
Oxidative Cyclization Based on Reversing the Polarity of Enol Ethers and Ketene Dithioacetals. Construction of a Tetrahydrofuran Ring and Application to the Synthesis of (+)-Nemorensic Acid
作者:Bin Liu、Shengquan Duan、Angela C. Sutterer、Kevin D. Moeller
DOI:10.1021/ja026739l
日期:2002.8.1
trapping group. The stereochemical outcome of cyclization reactions originating from the oxidation of an enol ether was found to be controlled by stereoelectronic factors. The utility of these cyclization reactions was illustrated with the synthesis of a key tetrahydrofuran building block for the synthesis of linalool oxide and rotundisine. Cyclization reactions triggered by the oxidation of a ketene dithioacetal