Tetrahedron letters

Facile synthesis of calix [4] arenes in ABAC type upper rim substitution

K No, JE Kim, KM Kwon

Index: Kwanghyun, No; Jong, Eun Kim; Kyoung, Mee Kwon Tetrahedron Letters, 1995 , vol. 36, # 46 p. 8453 - 8456

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Citation Number: 21

Abstract

3a. 85% yield; mp 242–243 °C, IR (KBr) 3200 cm −1 , 1 H NMR (acetone-d 6 ) δ 8.41 (br. s, 1, OH), 8.04 (br. s, 2, OH), 6.97 (s, 2, ArH), 6.82 (s, 2, ArH), 6.62 (d, 2, ArH, J = 8.1 Hz), 6.54 (d, 2, ArH, J = 8.1 Hz), 3.68 (s, 4, CH 2 ), 1.95 (s, 6, CH 3 ), 1.01 (s, 9, tBu); Anal. Calcd for C 26 H 30 O 3 : C, 79.95; H, 7.76. Found: C, 79.85; H, 7 69. 3b. 92% yield; mp 226–227 °C; IR (KBr) 3220 cm −1 , 1 H NMR (acetone-d 6 ) δ 9.57 (br. s, 1, OH ...