Analysis by RP-HPLC and Purification by RP-SPE of the C-Tetra(p-hydroxyphenyl)resorcinolarene Crown and Chair Stereoisomers

Table 1

Chemical shifts for pure stereoisomers crown and chair in ¹H-NMR and ¹³C-NMR spectra.

General structure	Proton or carbon	δ (ppm)
		^1H-NMR		^13C-NMR
		Crown	Chair	Crown	Chair
	1	5.52	5.39	40.6	41.2
	2	6.08	5.88	102.1	113.9
	2	—	6.06	—	—
	3	6.50	6.24	114.1	120.9
	3	—	6.27	—	—
	4	6.48	6.28	121.0	121.9
	5	6.64	6.38	129.6	129.8
	6	8.45	8.31	136.0	134.5
	6	—	8.35	—	—
	7	8.85	8.61	152.2	152.4
	8	—	—	152.3	152.6
	9	—	—	154.5	154.3

^∗Resolved signal corresponding to the protons of the chair conformer.