Table 1.

Δδ^SR data for the (S)- and (R)-MTPA esters of 23–26

	23	24	ΔδSR ( = δS – δR)
Proton	d (S)-Mosher ester	d (R)-Mosher ester	ppm	Hz (400 MHz)
3′H	4.98	5.12	−0.14	−56
4′H	4.03	4.09	−0.06	−24
1′H	6.02	6.07	−0.05	−20
2′H	5.35	5.37	−0.02	−8
5′H	5.24	5.24	0	0
5′Me	1.23	1.13	0.1	40
	25	26	ΔδSR ( = δS – δR)
Proton	d (S)-Mosher ester	d (R)-Mosher ester	ppm	Hz (400 MHz)
3′H	5.24	4.80	0.44	176
4′H	4.10	4.13	−0.03	–12
1′H	6.19	6.03	0.16	64
2′H	5.33	5.08	0.25	100
5′H	5.33	5.29	0.04	16
5′Me	1.26	1.35	−0.09	−36