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An efficient double allene protocol for the formation of benzazocines has been developed. The reaction constitutes a highly regioselective palladium‐catalyzed formal [6+2] annulation of allenyl benzoxazinanones with terminal allenes forming the challenging 8‐membered cycles. Decent yields and excellent regioselectivity have been observed under mild conditions with a remarkable Z‐stereoselectivity...
An efficient double allene protocol for the formation of benzazocines has been developed. The reaction constitutes a highly regioselective palladium‐catalyzed formal [6+2] annulation of allenyl benzoxazinanones with terminal allenes forming the challenging 8‐membered cycles. Decent yields and excellent regioselectivity have been observed under mild conditions with a remarkable Z‐stereoselectivity...
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