Journal of Organic Chemistry p. 3851 - 3857 (1987)
Update date:2022-08-04
Topics:
Hoffmann, Karl-Ludwig
Maas, Gerhard
Regitz, Manfred
Electrophilic diazoalkane substitution of the diazo esters 7a and b with 2,4,6-trimethylpyrylium tetrafluoroborate (6a) results in the formation of the 4-(diazomethyl)-4H-pyrans 8a and b as well as the 1H-1,2-diazepines 13a and b.The latter are formed by
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