Table 1.

RCO-, melting points (m.p.), and yields of N-acylbenzotriazoles 3a-k′ and N-acylcephalexines 4a-k′.

RCO-a–k′	3a–k′ Yield %	3a–k′m.p. (°C) m.p. (°C) [Lit.]	Time/h 4a–k′	4a–k′ Yield %	4a–k′ m.p. (°C)
	94	107–109 (106–108) [24]	10	87	210–212
	95	150–153 (151–152) [24]	12	86	216–218
	95	99–101 (100–101) [25]	12	84	168–170
	94	111–112 (112–113) [14]	9	84	132–134
	94	101–102 (101–102) [15]	8	82	200–202
	90	156–157 (155–156) [16]	10	87	226–228
	96	125–127 (126–128) [17]	6	91	197–199
	87	175–176	12	86	125–127
	89	148–150	12	82	137–139
	82	107–110	20	89	179–181
	90	142–144	14	93	234–236
	90	142–144	14	89	224–227