Table 1.

Screening of chiral bidentate ligands.

Entry	Ligand*2	2 a [%][a]	ee of 2 a [%]	3 a [%][a]
1	(R)‐SEGPHOS	99	73	0
2	(R)‐DM‐SEGPHOS	94	75	0
3	(R)‐DTBM‐SEGPHOS	21	n.d.	23
4	(R)‐BINAP	18[b]	83	0[b]
5	(R)‐Tol‐BINAP	87	92	0
6	(R)‐DM‐BINAP	72	16	17
7	(R)‐Cy‐BINAP	17[c]	29	trace[c]
8	(S)‐H8‐BINAP	88	90[d]	trace
9	(R)‐MeO‐BIPHEP	99	84	0
10	(S)‐SYNPHOS	99	65	trace
11	(R)‐DTBM‐ MeO‐BIPHEP	23[e]	n.d.	23[e]

[a] Yields were determined by ¹⁹F NMR using BTF as an internal standard. [b] 74 % Recovery of 1 a. [c] 60 % Recovery of 1 a. [d] Enantiomer of 2 a (ent‐2 a) was characterized by HPLC analysis. [e] 51 % Recovery of 1 a.