Angewandte Chemie - International Edition in English p. 2607 - 2609 (1997)
Update date:2022-08-10
Topics:
Denk
Thadani
Hatano
Lough
Two tert-butyl groups at the nitrogen atoms of the cyclic carbene 2, which is accessible from 1 by reduction with potassium, provide sufficient stability to enable it to be stored indefinitely under exclusion of air and moisture. In contrast, sterically less shielded carbenes of type 2 (R = Me, Et, iPr) dimerize slowly at room temperature to olefins 3.
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