An Efficient Flow-Photochemical Synthesis of 5<i>H</i>-Furanones Leads to an Understanding of Torquoselectivity in Cyclobutenone Rearrangements
作者:David C. Harrowven、Mubina Mohamed、Théo P. Gonçalves、Richard J. Whitby、David Bolien、Helen F. Sneddon
DOI:10.1002/anie.201200281
日期:2012.4.27
with the flow: 4‐Hydroxycyclobutenones were efficiently transformed into 5H‐furanones using an inexpensive flow‐photochemical setup. The results challenge the notion that this and the related thermochemical rearrangement display torquoselectivity in their electrocyclic opening to a vinylketene intermediate. Selectivity in the photochemicalrearrangement is due a dichotomous reactivity of the (E)‐ and
REED, MICHAEL W.;POLLART, DANIEL J.;PERRI, STEVEN T.;FOLAND, LAFAYETTE D.+, J. ORG. CHEM., 53,(1988) N 11, C. 2477-2482
作者:REED, MICHAEL W.、POLLART, DANIEL J.、PERRI, STEVEN T.、FOLAND, LAFAYETTE D.+
DOI:——
日期:——
PERRI, STEVEN T.;FOLAND, LAFAYETTE D.;MOORE, HAROLD W., TETRAHEDRON LETT., 29,(1988) N 29, C. 3529-3532
作者:PERRI, STEVEN T.、FOLAND, LAFAYETTE D.、MOORE, HAROLD W.
DOI:——
日期:——
Synthesis of 4-substituted-3-alkoxy-3-cyclobutene-1,2-diones
作者:Michael W. Reed、Daniel J. Pollart、Steven T. Perri、Lafayette D. Foland、Harold W. Moore
DOI:10.1021/jo00246a016
日期:1988.5
Photolysis of 4-substituted-4-hydroxy-3-cyclobuten-1-ones: a new route to butenolides from 4-hydroxycyclobutenones
作者:Steven T. Perri、Lafayette D. Foland、Harold W. Moore
DOI:10.1016/0040-4039(88)85284-5
日期:1988.1
ring closure to provide butenolide products. This transformation is envisaged to involve a stereoselective disrotatory electrocyclic ring opening to the corresponding conjugated ketene in which the C4 hydroxyl group rotates inward towards the ketene moiety. Intramolecular trapping of the ketene moiety with the proximal hydroxyl group results in the corresponding butenolide products.