Optimization of reaction conditions for Ir-catalyzed reaction of racemic allenyl carbonate 1a with benzylamine 2a^a.

Entry	n	T/°C	Yield of 3aab (%)	Yield of 4aab (%)	Recovery of 1ab (%)
1	1.5	r.t.	26	25	—
2c	1.5	r.t.	24	27	—
3	2	r.t.	35	28	—
4	4	r.t.	41	6	38
5d	4	r.t.	45	7	45
6d	4	40	64	8	11
7d	4	50	70	8	—
8d	4	60	65	9	—

^aThe reaction was conducted using 1a (0.2 mmol) in 0.4 mL of THF.

^bDetermined by ¹H NMR analysis of the crude reaction mixture using 1,3,5-trimethylbenzene as an internal standard.

^c7 mol% Ir pre-catalyst A was used.

^dThe reaction was conducted using 1a (0.2 mmol) in 1.0 mL of THF.