Racemic C12-ethanolamine plasmalogen 5b was prepared in high yield. The amino group was generated by selective reaction of azide 4b with polymeric triphenylphosphine followed by mild hydrolysis of the intermediate phosphine imine. A novel universal phosphorylation reagent 2-azidoethyl dichlorophosphate (7) was used.
Synthesis of a Photoactivatable (2<i>S</i>,3<i>R</i>)-Sphingosylphosphorylcholine Analogue
作者:Xuequan Lu、Robert Bittman
DOI:10.1021/jo050513u
日期:2005.6.1
sites. The key steps in the synthesis are selective reduction of the triple bond in enyne 6 to install the 4E double bond, Suzuki coupling to incorporate the benzophenone photophore at the end of the sphingoid chain, and reduction of the 2-azidoethyl phosphate headgroup of 13 followed by N,N,N-trimethylation to introduce the radiolabel into the choline moiety. The synthesis was completed by the release