Journal of the Chemical Society. Chemical communications p. 1154 - 1156 (1991)
Update date:2022-09-26
Topics:
Satake, Kyosuke
Okuda, Ryoichi
Hashimoto, Michiaki
Fujiwara, Yasushi
Watadani, Izumi
et al.
Demethoxycarbonylation of methyl 2,5-di-tert-butyl-1H-azepine-1-carboxylate using 1,8-diazabicyclo<5.4.0>undec-7-ene gives exclusively two isomers of 3H-azepine derivatives, while methyl 3,6-di-tert-butyl-1H-azepine-1-carboxylate gives a mixture of 2H-, 3H- and 4H-azepine derivatives under the same conditions because of a 1,5-hydrogen shift in the resulting triene system.
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