[C:1](Cl)(=[O:6])[C:2]([CH3:5])([CH3:4])[CH3:3].[OH:8][C:9]1[C:26]([O:27][CH2:28][CH2:29][CH2:30][CH2:31][CH3:32])=[CH:25][C:24]2[C:23]3[C:18](=[CH:19][C:20]([O:39][CH2:40][CH2:41][CH2:42][CH2:43][CH3:44])=[C:21]([O:33][CH2:34][CH2:35][CH2:36][CH2:37][CH3:38])[CH:22]=3)[C:17]3[C:12](=[CH:13][C:14]([O:51][CH2:52][CH2:53][CH2:54][CH2:55][CH3:56])=[C:15]([O:45][CH2:46][CH2:47][CH2:48][CH2:49][CH3:50])[CH:16]=3)[C:11]=2[CH:10]=1>N1C=CC=CC=1.C(OCC)C>[C:1]([O:8][C:9]1[C:26]([O:27][CH2:28][CH2:29][CH2:30][CH2:31][CH3:32])=[CH:25][C:24]2[C:23]3[C:18](=[CH:19][C:20]([O:39][CH2:40][CH2:41][CH2:42][CH2:43][CH3:44])=[C:21]([O:33][CH2:34][CH2:35][CH2:36][CH2:37][CH3:38])[CH:22]=3)[C:17]3[C:12](=[CH:13][C:14]([O:51][CH2:52][CH2:53][CH2:54][CH2:55][CH3:56])=[C:15]([O:45][CH2:46][CH2:47][CH2:48][CH2:49][CH3:50])[CH:16]=3)[C:11]=2[CH:10]=1)(=[O:6])[C:2]([CH3:5])([CH3:4])[CH3:3]181 mg (1.5 mmol) pivaloyl chloride was added to a solution of 673 mg (1 mmol) 2-hydroxy-3,6,7,10,11-pentapentyloxytriphenylene (see Henderson et al., Liquid Crystals 18 (1995) 191) in 1 mL pyridine. The mixture was heated for one hour at 80° C., diluted with diethyl ether and extracted repeatedly with dilute HCl and sodium carbonate solution. Purification was performed by crystallization from ethanol.
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