N-Aryl Lactams by Regioselective Ozonation of N-Aryl Cyclic Amines

Table 2

Synthesis of 𝑁-aryl-lactams by ozonation of 𝑁-𝑁-polymethylene-anilines.

Entry^a	Substrate	Conversion^b	Product	Yield %^c
1		68%		52
2		70%		63
3		74%		71
4		20%		18

^aFor the condition see the experimental part.
^bConversions are calculated on the recovered starting material.
^cIsolated yield after silica gel chromatography.