Diazophosphonates in cyclic ether synthesis. Use of the intramolecular Wadsworth-Emmons reaction
作者:Christopher J. Moody、Eric-Robert H.B. Sie、Janusz J. Kulagowski
DOI:10.1016/0040-4039(91)80451-b
日期:1991.11
Treatment of the phosphonates 3, derived from the diazophosphonates 1 and 2 by rhodiumcarbenoid O-H insertion reactions, with sodium hydride in THF results in intramolecular Wadsworth-Emmons reaction and formation of the cyclicethers 4.
The use of diazophosphonates in the synthesis of cyclic ethers
作者:Christopher J. Moody、Eric-Robert H.B. Sie、Janusz J. Kulagowski
DOI:10.1016/s0040-4020(01)88479-9
日期:1992.1
described. The first involves the rhodium(II) catalysed O-H insertion of 2-propanol followed by Wadsworth-Emmons reaction to give the enol ethers 3, and deprotection and cyclisation to the cyclic enol ethers 5. The second route involves the preparation of aldehyde and ketone phosphonates 9, also by rhodium carbenoid O-H insertionreactions, followed by functional group interconversion. On treatment