Microwave-Assisted Synthesis of Tetrahydrocarbazole Linked 1,2-Diazoles in Aqueous-Brønsted Acid Catalytic System

Table 2

Summary of physical data of synthetic diazoles 4/5/6(a–o).

Entry	Product	Mol. formula	Color/state	Conventional		Microwave
				Time (hr)	Yield (%)	Time (min)	Yield (%)
(1)			Yellowish green solid	5	68	4	68
(2)			Yellowish green solid	6	72	5	72
(3)			Yellowish green solid	5	82	5	83
(4)			Yellowish green solid	6	79	6	79
(5)			Yellowish green solid	4.5	80	6	80
(6)			Yellowish green solid	4.5	71	7	71
(7)			Yellowish green solid	5.5	84	5	82
(8)			Yellowish green solid	4	83	4	83
(9)			Yellowish green solid	5	77	6	77
(10)			Yellowish green solid		84	6	81
(11)			Yellowish green solid		75	6	75
(12)			Yellowish green solid	5.5	73	6	73
(13)			Yellowish green solid	6.0	85	5	85
(14)			Yellowish green solid	6.5	87	6	87
(15)			Yellowish green solid	4.5	73	5	79
(16)			Reddish orange solid	5	76	6	76
(17)			Reddish orange solid	5.5	75	6	75
(18)			Reddish orange solid	4.5	78	5	78
(19)			Reddish orange solid	5	84	5	84
(20)			Reddish orange solid	5	84	6	84
(21)			Reddish orange solid	4.75	74	5	74
(22)			Reddish orange solid	6.5	75	6	75
(23)			Reddish orange solid	5.75	84	6	84
(24)			Reddish orange solid	5	78	5	78
(25)			Reddish orange solid	4.5	80	5	80
(26)			Reddish orange solid	6.5	75	6	75
(27)			Reddish orange solid	6	78	5	78
(28)			Reddish orange solid	5.5	79	7	79
(29)			Reddish orange solid	6	84	6	84
(30)			Reddish orange solid	5.5	82	7	82
(31)			Yellow solid	2.5	75	5	88
(32)			Yellow solid	3.5	62	7	85
(33)			Yellow solid	3.75	65	8	79
(34)			Yellow solid	3.5	60	6	86
(35)			Yellow solid	4	65	8	78
(36)			Yellowish brown gummy	3.75	24	6	76
(37)			Reddish brown gummy	5.5	31	6	75
(38)			Reddish brown solid	6	39	5	78
(39)			Dark brown solid	6.25	33	5	84
(40)			Reddish brown solid	5	36	6	80
(41)			Brownish Yellow solid	5.5	66	8	81
(42)			Reddish yellow solid	4.75	63	5	82
(43)			Yellow solid	5	64	7	84
(44)			Yellow solid	5.5	59	7	75
(45)			Yellow solid	5.25	62	9	86