- Full text PDF available (2)
- This year (0)
- Last 5 years (2)
- Last 10 years (9)
Journals and Conferences
A concise synthesis of three members of the withasomnine family of natural products is reported. The synthesis features a regioselective sydnone-alkynylboronate cycloaddition followed by Suzuki cross… (More)
A reliable species–area relationship holds true for a number of terrestrial systems. When species–area data are plotted on logarithmic axes, the slope bears strong consistency across taxa. This study… (More)
Sydnones (III) are prepared by two approaches as precursors for the cycloaddition reaction with terminal or internal alkynes to give the pyrazoles.
Surprisingly low levels of regiocontrol are observed in sydnone cycloadditions with heterocyclic alkynes (XI) compared to ethynylbenzene (II).
Cu salts have been found to promote the cycloaddition reaction of sydnones and terminal alkynes, providing significant reduction in reaction times. Specifically, the use of Cu(OTf)2 is found to… (More)
We report the synthesis and some structural studies of 4-trifluoromethyl, 4-difluoromethyl-, and 4-monofluoromethylsydnones. All but the latter compounds are stable and represent effective precursors… (More)
The synthesis of azine-substituted pyrazoles by a sydnone cycloaddition strategy is described. Incorporation of a 3-pyridyl moiety at the sydnone N-atom has little effect on either reactivity or… (More)
The process is significantly accelerated in the presence of copper salts: the reaction time can be reduced from <12h to a few hours or even 20 min.
Two synthetic approaches to 4-trifluoromethylsydnones, a novel class of these mesoionic reagents, are reported. These compounds undergo regioselective alkyne cycloaddition reactions, thereby… (More)