Iodine-induced cyclisations of (E)- and (Z)-3-hydroxy-5-alkenoates: Stereoselective approaches to trisubstituted tetrahydrofurans
作者:Frank Bennett、Simon B. Bedford、Kathryn E. Bell、Garry Fenton、David W. Knight、Duncan Shaw
DOI:10.1016/s0040-4039(00)79028-9
日期:1992.10
Iodoetherification of the ()-3-hydroxy-5-alkenoates 4 leads exclusively to the hydroxytetrahydrofurans 5 whereas similar cyclisations of the corresponding ()-isomers [10, 13 and 15] give largely the iodo-tetrahydrofurans [11, 14 and 16].
Stereoselection in iodolactonisations of 3-silyloxy-5-alkenoic acids
作者:Simon B. Bedford、Garry Fenton、David W. Knight、Duncan Shaw
DOI:10.1016/s0040-4039(00)79027-7
日期:1992.10
Iodolactonisations of (Z)- or (E) 3 silyloxy-5-alkenoic acids [1 and 7] both lead to trans-disubstituted valerolactones [6 and 8]. which differ only in the stereochemistry of the iodine substituent.
Bedford, Simon B.; Bell, Kathryn E.; Bennett, Frank, Journal of the Chemical Society. Perkin transactions I, 1999, # 15, p. 2143 - 2153
作者:Bedford, Simon B.、Bell, Kathryn E.、Bennett, Frank、Hayes, Christopher J.、Knight, David W.、Shaw, Duncan E.
DOI:——
日期:——
On the stereoselection of iodolactonizations of 3-silyloxyalk-5-enoic acids
作者:Simon B. Bedford、Garry Fenton、David W. Knight、Duncan E. Shaw
DOI:10.1039/p19960001505
日期:——
Iodolactonizations of 3-triisopropylsilyloxyalk-5-enoic acids (10b and 12) proceed by way of common transition-state geometry 23, in which the silyloxy group is positioned axially, presumably due to hydrogen bonding with the carboxylic acid group.