Single-step synthesis of a new series of meso di-Mannich bases from the cyclic aminal (2S,7R,11S,16R)-1,8,10,17-tetraazapentacyclo[8.8.1.1.8,170.2,7011,16]icosane and p-substituted phenols

Table 2 Assignment of vibrational modes of compounds 8a-l

Product	1	2	3	4	5	6	7	8	9
8a	3050	2848	1630	1448	1387	1194	1289	1063	772
8a	3050	2848	1495	1448	1387	1124	1289	1063	737
8b	3053	2922	1605	1444	1385	1170	1272	1069	764
8b	3053	2850	1480	1444	1385	1069	1272	1069	680
8c	3054	2933	1636	1444	1384	1169	1283	1071	761
8c	3054	2849	1476	1444	1384	1112	1283	1071	673
8d	3070	2931	1603	1440	1367	1179	1262	1039	764
8d	3070	2854	1476	1440	1367	1129	1262	1039	764
8e	3042	2928	1609	1449	1384	1190	1293	1097	791
8e	3042	2854	1497	1449	1384	1110	1293	1097	771
8f	3040	2980	1612	1452	1384	1178	1285	1098	840
		2931	1495			1124		1058	770
		2857	1495			1124		1058	770
8 g	3049	2932	1613	1448	1384	1178	1270	1037	840
8 g	3049	2875	1497	1448	1384	1127	1270	1037	771
8 h	3056	2961	1613	1449	1383	1177	1258	1059	874
		2931	1497			1127			770
		2858	1497			1127			770
8i	3037	2946	1618	1469	1393	1096	1243	1070	742
		2913	1486
		2874	1486
8j	3060	2962	1613	1449	1394	1117	1259	1067	817
		2934							773
		2862							773
8 k	3060	2962	1613	1449	1394	1122	1252	1068	857
		2934	1502						824
		2862	1502						824
8 l	3051	2962	1617	1465	1384	1068	1289	1039	820
		2923	1497						775
		2850

Vibrational modes: 1) Stretching frequency of O-H bonds, 2) Stretching frequency of the C_sp3-H bonds, 3) symmetric and asymmetric stretching frequency of the C-C bond, 4) Flexion frequency of the C-H bond in aromatic rings, 5) out of plane flexion frequency of methylene groups, 6) Stretching frequency of the C-N bonds, 7) Stretching frequency of the C-O bonds, 8) in the plane deformation of the C-H bonds in aromatic rings, 9) out of plane deformation of the C-H bonds in aromatic rings.
Table 2 shows the measured vibrational modes of compounds 8a-l, obtained using FT-IR spectroscopy.

ISSN: 2661-801X