作者:Kevin I. Booker-Milburn、Sirin Gulten、Andrew Sharpe
DOI:10.1039/a702386c
日期:——
Intramolecular photochemical [2 + 2] cycloaddition of allyl alcohol
linked to amino acid derived 3,4,5,6-tetrahydrophthalimides, either
via a carbonate or silicon tether, gives the corresponding
cyclobutanes in excellent yield with diastereoselectivities as high as
8:1.
Use of temporary tethers in the intramolecular [2+2] photocycloaddition reactions of tetrahydrophthalimide derivatives: a new approach to complex tricyclic lactones
作者:Şirin Gülten、Andrew Sharpe、James R. Baker、Kevin I. Booker-Milburn
DOI:10.1016/j.tet.2007.02.064
日期:2007.4
The intramolecular [2+2] photocycloaddition reactions of a series of alkenols tethered to ethanolamine, l-(+)-valinol and R-(−)-2-phenylglycinol derived 3,4,5,6-tetrahydrophthalimides via a carbonate or silicon linkage have been examined. These [2+2] photocycloadditions gave the corresponding cyclobutanes in high yield with complete endo control in all cases and with diastereoselectivities as high