Table 1.

Rh₂(S-DOSP)₄-Catalyzed Cyclopropenation of Pyridotriazoles with Alkynes

no.	R1	R2		R3		yield,a %
1	Cl	Ph	1a	Ph	3a	81
2	Cl	Ph	1a	p-OMeC6H4	3b	79
3	Cl	Ph	1a	p-CO2MeC6H4	3c	65
4	Br	Ph	1b	Ph	3d	88b
5	Cl	p-OMeC6H4	1c	Ph	3e	67
6	Cl	p-OMeC6H4	1c	o-tolyl	3f	45
7	Cl	p-CF3C6H4	1d	Ph	3g	68
8	Cl	p-CF3C6H4	1d	1-cyclohexenyl	3h	93
9	Cl	CO2Me	1e	p-tolyl	3i	93c
10	Cl	CO2Me	1e	p-OMeC6H4	3j	67
11	Cl	CO2Me	1e	p-CO2MeC6H4	3k	72
12	Cl	CO2Me	1e	m-CO2MeC6H4	3l	87
13	Br	Ph	1b	n-butyl	3m	69
14	Cl	CO2Me	1e	Ph	3n	86d
15	Cl	Ph	1a	(CH2)3Cl	3o	68

^aIsolated yield.

^b8% ee.

^c86% ee.

^d84% ee.