Table 2.

Addition of arylboronic acids to enones accelerated by silver salts [34–35].

entry	cyclic substrates		Ar	additive (equiv)	temp. (°C)	yield (%)	ee (%)
	n (catalyst)
1	0 (PdL1b)		Ph	AgBF4	0	94	94 (S)
2	1 (PdL1a)		Ph	AgBF4	0	90	92 (R)
3	1 (PdL1a)		Ph	AgBF4 (0.05)	20	99a	89 (R)
4	1 (PdL1a)		3-MeO-C6H4	AgBF4 (0.05)	20	98a	91 (R)
5	2 (PdL1a)		Ph	AgBF4	0	92	89 (R)
	acyclic substrates
	R1	R2
6	Ph	Ph	4-Me-C6H4	AgBF4 (0.1)	20	73	95
7	Ph	Me	3-Cl-C6H4	–	25	90	93
8	Ph	Me	3-MeO-C6H4	AgBF4 (0.1)	0	96	95
9	Ph	Me	4-MeO-C6H4	AgBF4 (0.1)	0	75	94
10	Ph	Me	3,4-(CH2O2)-C6H3	–	0	77	95
11	Ph	Me	4-MeS-C6H4	AgBF4 (0.1)	25	<10	–
12	Ph	Me	4-Ac-C6H4	–	0	95	93
13	Ph	n-Bu	3-MeO-C6H4	AgBF4 (0.1)	0	66	99
14	Ph	iPr	3-MeO-C6H4	AgBF4 (0.1)	0	80	95
15	Ph	Cy	3-MeO-C6H4	AgSbF6 (0.05)	0	93	95
16	Ph	Ph	3-MeO-C6H4	AgBF4 (0.1)	0	86	97
17	Ph	Ph	4-Me-C6H4	–	0	91	95
18	Ph	4-MeO-C6H4	3-MeO-C6H4	AgSbF6 (0.1)	0	73	95
19	Ph	3-NO2-C6H4	3-MeO-C6H4	AgSbF6 (0.2)	0	44	92
20	4-MeO-C6H4	Ph	3-MeO-C6H4	AgBF4 (0.1)	0	75	99
21	2-naphthyl	Me	3-MeO-C6H4	AgBF4 (0.1)	0	99	96
22	2-BnO-5-Me-C6H3	Me	Ph	–	0	97	96
23		Ph	Ph	–	0	86	98
24	n-C5H11	Me	Ph	AgBF4	0	99	80

^aReaction time: 48 h.