Chemistry Letters p. 389 - 392 (1994)
Update date:2022-07-30
Topics:
Nagao, Yoshimitsu
Lee, Woo-Song
Kim, Kweon
A convenient preparation of allenyl aryl ketones was achieved by the Weinreb-modified Grignard reaction of N-methoxy-N-methylamides with propargylmagnesium bromide.On treatment with BF3*OEt2, the allenyl aryl ketones were converted to methylenebenzocyclopentenones via a new 5-endo-mode cyclization.
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