Intramolecular Anodic Olefin Coupling Reactions and the Synthesis of Cyclic Amines
作者:Hai-Chao Xu、Kevin D. Moeller
DOI:10.1021/ja910586v
日期:2010.3.3
Anodic olefin couplingreactions using a tosylamine trapping group have been studied. The cyclizations are favored by the use of a less-polar radical cation and more basic reaction conditions. The most significant factor for obtaining good yields of cyclic product is the use of the more basic reaction conditions. However, a number of factors including the nature of both the solvent and the electrolyte
Intramolecular Anodic Olefin Coupling Reactions: The Use of a Nitrogen Trapping Group
作者:Hai-Chao Xu、Kevin D. Moeller
DOI:10.1021/ja806259z
日期:2008.10.15
Anodicolefincouplingreactionsusing a tosylamine trapping group have been studied. The cyclizations are favored by the use of a less-polar radical cation and more basic reaction conditions. The most significant factor for obtaining good yields of cyclic product is the use of the more basic reaction conditions. The cyclizations allow for the rapid synthesis of substituted proline derivatives.
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
The diastereoselective auxiliary-based intramolecular Michael-type additions to alkylidene bissulfoxides derived from dithiane and dithiolane were investigated. Utilization of substrates bearing N- and O-nucleophilic functions led to the formation of the respective cyclic substrates with selectivities ranging from 51:49 to 85:15. Cleavage of the bissulfoxide moiety by a two-step sequence yielded chiral
Intramolecular Hydroamination of Dithioketene Acetals: An Easy Route To Cyclic Amino Acid Derivatives
作者:Hai-Chao Xu、Kevin D. Moeller
DOI:10.1021/ol102193x
日期:2010.11.19
Catalytic intramolecular hydroamination of dithioketene acetals was developed for the synthesis of cyclic amino acid derivatives. Triggered by the addition of a catalytical amount of n-BuLi, the reaction proceeds to give proline and pipecolic acid derivatives in excellent yields and diastereoselectivity.