Table 1.

ATRC of 2,2,2-trichloro-N-(cyclohex-2-en-1-yl)acetamide (5) catalyzed by various ruthenium complexes.^a

Entry	Ru cat.	Conversion (%)b
1	–	0
2	1	94
3	2	98
4	3	55
5	7	97

^aExperimental conditions: substrate (0.2 mmol), catalyst (2 μmol), toluene (1 mL) in a sealed tube under Ar for 2 h at 160 °C.

^bDetermined by GC with n-dodecane as internal standard.