In your question you need to be more specific about: (a) design/purpose of the experiment, and (2) about the conditions. Unless there is a subsequent reaction involved, I would think that any Michael addition can be retro-ed.
See structures and conditions in the attachment.
Generally, Michael donor must be very stable (e.g. pyridine derivative/tert. amine, sulfide, thiopicrate anion, etc.)) or Michael akceptor is eliminated in a non-activated form (2-vinylpyridine in attached example).
Reddy,
You have received two answers. I agree with Martynow that we need more detailed to give you an answer. On the hand, Pazdera provided you with nice examples. Here, I would like to direct you to a couple of literature with the hope that these might help you
--- Minko, Irina G.; Kozekov, Ivan D.; Harris, Thomas M.; Rizzo, Carmelo J.; Lloyd, R. Stephen; Stone, Michael P. Chemical Research in Toxicology, 22, 759-778 (2009).
---Pollack, Ralph M.; Strohbeen, David, J. AM. Chem. Soc., 94, 2534-5 (1972).
Good luck
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