Complete Assignment of ^𝟏H and ^𝟏𝟑C NMR Spectra of 1,2,4-Trisubstituted Pyrroles

Table 2

¹³C NMR chemical shift assignments (ppm) for pyrroles 1a–f, 2a-b, 3a-b, 4, and 5a-b in CDCl₃.

H	1a	1b	1c	1d	1e	1f	2a	2b	3	4	5 a	5 b
C-2	133.4	134.6	138.7	129.0	129.6	128.1	133.6	132.5	133.7	133.1	133.4	134.6
C-3	110.3	107.4	112.1	109.5	108.6	111.5	110.2	107.1	110.1	112.1	110.0	109.1
C-4	115.6	114.3	114.5	114.4	114.4	114.2	116.9	115.9	114.4	116.3	115.2	114.7
C-5	122.6	120.1	122.6	120.6	121.0	122.2	122.0	120.3	121.5	123.7	121.7	120.9
C-6	31.3	33.6	33.4	33.5	33.3	33.5	34.8	33.5	33.8	33.2	33.4	32.9
C-7	178.8	179.4	178.7	179.0	178.9	179.2	172.2	178.9	178.7	178.3	179.2	178.2
C-8	51.1	50.6	50.9	50.9	50.7	50.8	51.0	51.0	47.8	134.4	49.9	49.3
C-9	139.1	138.9	138.7	138.9	138.3	138.5	139.3	138.6	32.6	126.1	135.2	134.7
C-10	129.3	129.2	129.2	129.1	129.2	129.3	129.2	129.1	20.8	128.5	117.6	116.9
C-11	127.0	126.9	127.3	127.0	126.9	127.3	126.9	126.9	14.2	126.8	133.4	130.0
C-12	127.5	127.8	127.9	127.7	127.9	127.5	127.3	127.7	135.8	128.5	128.8	128.6
C-13	127.0	126.9	127.3	127.0	126.9	127.3	126.9	126.9	129.0	126.1	129.2	128.9
C-14	129.3	129.2	129.2	129.1	129.2	129.3	129.2	129.1	129.6	140.7	127.4	136.6
C-15	135.6	32.1	66.3	32.1	25.8	27.4	135.3	121.3	127.5	128.7	129.2	21.1
C-16	128.9	26.7	57.5	103.5	52.0	36.0	128.8	130.9	129.6	129.4	128.8	128.9
C-17	129.1	28.8		62.6	62.0	138.9	129.1	55.3	129.0	127.0		128.6
C-18	127.8	23.0		15.6	14.4	129.6	127.7	134.5		129.4
C-19	129.1	14.5		62.6	62.0	129.0	129.1	121.1		128.7
C-20	128.9			15.6	14.4	128.0	128.8	23.5
C-21					169.2	129.0	80.7	31.9
C-22					169.2	129.6	28.6	32.9
C-23							28.6	27.9
C-24							28.6	27.3
C-25								23.2
C-26								61.0
C-27								14.6