Karl Scheidt has a very nice example of umpolung chemistry catalyzed by N-heterocyclic carbenes in a [3+3] cycloaddition. This appeared on the web yesterday.
Audrey Chan and Karl A. Scheidt, JACS DOI: 10.1021/ja0709167
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Interestingly, I was just teaching my synthesis students about the utility of diazo compounds for cyclopropanation and Wolff rearrangements and what appears on OL this morning? A very nice and practical method for the preparation of diazo compounds. This could come in handy.
Muhammad I. Javed and Matthias Brewer, OL DOI: 10.1021/ol070515w
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2 comments:
I think I will like this blog...
Very nice blog !
Can i permit a little remark, isn't an oxygen that must'nt be there on your first figure ?
Regards
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