An Efficient, Stereoselective Approach to syn-1,2-Diols Protected as Cyclic Carbonates
摘要:
Enantioenriched 4-hydroxyalk-2-ynyl carbonates (or benzoates) have been prepared by stereoselective zinc-mediated addition of alkyl 2-propynyl carbonates (or their benzoate analogues) to aldehydes. Their partial reduction to Z-olefins followed by cyclization under mild Pd-catalyzed conditions allowed a straightforward access to enantioenriched syn-1,2-diols protected as cyclic carbonates.
Carbon Dioxide Utilisation for the Synthesis of Unsymmetrical Dialkyl and Cyclic Carbonates Promoted by Basic Ionic Liquids
作者:Peter Goodrich、H. Q. Nimal Gunaratne、Lili Jin、Yuntao Lei、Kenneth R. Seddon
DOI:10.1071/ch17530
日期:——
basic ionicliquids, via carbondioxide conversion, is described here. These ionicliquids were found to be effective bases for the fixation of carbondioxide by various alcohols and benzyl bromide, at room temperature. When the alcohol and the halide functionalities are present within the same substrate, the reaction cleanly produces a cyclic carbonate. These functionalised basic ionicliquids were
Natural products in parallel synthesis: Triazole libraries of nonactic acid
作者:Sarah B. Luesse、Gregg Wells、Abhijit Nayek、Adrienne E. Smith、Brian R. Kusche、Stephen C. Bergmeier、Mark C. McMills、Nigel D. Priestley、Dennis L. Wright
DOI:10.1016/j.bmcl.2008.06.020
日期:2008.7
The synthesis of a library of nonactic acid-derived triazoloamide derivatives and their evaluation as antimicrobial agents is described.
描述了非乳酸衍生的三唑胺衍生物库的合成及其作为抗菌剂的评价。
A facile one-step synthesis of star-shaped alkynyl carbonates from CO<sub>2</sub>
作者:Rebecca Shu Hui Khoo、Agnes Mei Xian Lee、Pierre Braunstein、T. S. Andy Hor、He-Kuan Luo
DOI:10.1039/c5cc04088d
日期:——
The synthesis of new star-shaped compounds containing three or six pendant carbonates with terminal alkynes at 1 atm CO2 and room temperature.
在1大气压CO2和室温下合成含有三个或六个挂链碳酸酯和末端炔基的新星形化合物。
New Stereoselective Approach to 1,2,3-Triols: Application to a Straight forward Access to Polyoxamic Acid Array
An efficient approach to alk-4-yne-l,2,3,6-tetraols is described by stereoselective addition of terminal 2-alkyn-1-yl esters to Ley's butane-2,3-diacetal-protected glyceraldehyde. The application of this methodology to a convenient synthesis of (-)-polyoxamic acid derivative is disclosed herein.
Palladium catalyzed hydrostannation of alkynes and palladium-catalyzed hydrostannolysis of propargyl or propargyloxycarbonyl derivatives of various functional groups