Reference

Six-membered ring phenol resin

Six-membered ring phenol resin. (Hitachi Chemical Co., Ltd., Japan). Jpn. Kokai Tokkyo Koho JP 59012914 A2 23 Jan 1984 Showa, 4 pp. (Japanese). (Japan). CODEN: JKXXAF. CLASS: IC: C08G008-28; B01J023-04; C08G008-12. APPLICATION: JP 82-123517 15 Jul 1982. DOCUMENT TYPE: Patent CA Section: 37 (Plastics Manufacture and Processing) Section cross-reference(s): 25 The title resin was prepd. by reacting p-alkylphenol and formaldehyde to make a product of av. mol. wt. 700-3000, methylol content 5-25 mol%, dimethylene ether content 7-23 mol%, and methylene content 52-88 mol%, and then heating in an aprotic solvent with KOH or RbOH. For example, p-tert-butylphenol (I) 60, 37% HCHO 64.9, and KOH 4.48 g were heated 5 h at 100° to give a product of Mn = 1810, methylol content 10%, dimethylene ether content 12%, and methylene content 78%; 15 g of the above product in 100 mL xylene, and 2.1 g RbOH in 1 mL H2O were heated 5 h at 140° to give I-HCHO cyclohexamer [78092-53-2].

Lower rim arylation of calix[n]arenes with extended perfluorinated domains

All Rights Reserved. Lower rim arylation of calix[n]arenes with extended perfluorinated domains. Buscemi, Silvestre; Pace, Andrea; Piccionello, Antonio Palumbo; Pappalardo, Sebastiano; Garozzo, Domenico; Pilati, Tullio; Gattuso, Giuseppe; Pappalardo, Andrea; Pisagatti, Ilenia; Parisi, Melchiorre F. ( Dipartimento di Chimica Organica E. Paterno, Universita di Palermo, Palermo I-90128, Italy). Tetrahedron Letters, 47(51), 9049-9052 (English) 2006 Elsevier Ltd. CODEN: TELEAY. ISSN: 0040-4039. DOCUMENT TYPE: Journal CA Section: 25 (Benzene, Its Derivatives, and Condensed Benzenoid Compounds) Exhaustive O-arylation of p-tert-butylcalix[n]arenes (n = 4 - 8) with an excess of 3-pentadecafluoroheptyl-5-pentafluorophenyl-1,2,4-oxadiazole and K2CO3 in refluxing acetonitrile provides an easy entry to a new family of perfluorinated calix[n]arenes. The cyclic tetramer furnishes a mixt. of cone, partial cone, and 1,2-alternate conformers, while the larger macrocycles afford single products. The structures of all new compds.There are some commonly used reagents with their cas registry numbers 919490-00-9 and 78092-53-2 in this article. are substantiated by NMR techniques and MALDI-TOF mass spectral data. Single-crystal X-ray diffraction studies on the pentamer deriv. reveal a distorted cone-in conformation of the calixarene cup. .