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
[EN] AZIRIDINYLQUINOLINEDIONE DERIVATIVES AND PROCESS FOR THEIR PREPARATION<br/>[FR] DERIVES D'AZIRIDINYLQUINOLINEDIONE ET LEUR PROCEDE DE PREPARATION
申请人:KOREA INST SCI & TECH
公开号:WO2002034742A1
公开(公告)日:2002-05-02
The present invention relates to aziridinylquinolinedione derivatives having an anti-tumor effect of formula (1), a process for their preparation and their use as an anti-cancer agent, wherein R1 is a hydrogen atom or C¿1?-C4 alkyl; one of R?2 and R3¿ is an aziridinyl or 2-methylaziridinyl and the other one is a halogen atom, C¿1?-C4 alkoxy, azido, or amino.