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Structure of an unexpected trimer from the reaction of ageratochromene II with aluminum chloride

✍ Scribed by Changhu Chu; Jiehan Hu; Tao XU; Hongbin Xiao; Xinmiao Liang

Publisher
John Wiley and Sons
Year
2002
Tongue
English
Weight
103 KB
Volume
40
Category
Article
ISSN
0749-1581

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✦ Synopsis

Abstract

A new trimer from the reaction of ageratochromene [1] (6,7‐dimethoxy‐2,2‐dimethyl‐1‐benzopyran) with anhydrous aluminum chloride was shown to be 3,4‐dihydro‐6,7‐dimethoxy‐2,2‐dimethyl‐3‐(6′,7′‐dimethoxy‐2′,2′‐dimethyl‐2__H__‐1‐benzopyran‐4′‐yl)‐4‐(3′,4′‐dihydro‐6′, 7′‐dimethoxy‐2′,2′‐dimethyl‐2__H__‐1‐benzopyran‐3′‐yl)‐ 2__H__‐1‐benzopyran. Its structure was confirmed by NMR (^1^H, ^13^C, DEPT‐135. COSY, HMBC, HSQC, TOCSY and NOESY), IR, mass spectra and elemental analysis. Copyright © 2002 John Wiley & Sons, Ltd.

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