Analgesic compounds are of the general formula (I):
in which, R¹ and R² each represents hydrogen or C₁-C₆ alkyl, or R¹ and R² together with the nitrogen atom to which they are attached form a heterocycle; E represents methylene, sulphur, oxygen or imino group optionally substituted with C₁-C₆ alkyl or aralkyl; ring A is aryl or heteroaryl ring, optionally substituted; R³ is hydrogen or C₁-C₆ alkyl and R⁴ is hydrogen or R³ and R⁴ together represent a group of formula (IV):
-(CRaRa)m-C(=Y)- (IV)
(wherein Ra and Ra is C₁-C₆ alkyl or hydrogen, up to a maximum of 3 alkyl groups, m is 1, 2, or 3, and Y is two hydrogens or oxygen); provided that when E represents a methylene group, then R³ is a C₁-C₆ alkyl group or R³ and R⁴ together represent a group of the formula (IV).
Kirillova, K. M.; Skvortsova, T. A.; Nikonova, L. Z., Journal of Organic Chemistry USSR (English Translation), 1992, vol. 28, # 3.1, p. 427 - 430
作者:Kirillova, K. M.、Skvortsova, T. A.、Nikonova, L. Z.、Chugunov, Yu. V.、Igonin, V. B.、Mukhtarov, A. Sh.
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Enantioselective Synthesis of Diarylmethylamines through the Aza-Friedel–Crafts Reaction of 1,3,5-Trialkoxy Benzenes and <i>N</i>-Sulfonyl Aldimines Catalyzed by BINOL-Derived Disulfonimides
作者:Zi-Hao Jia、Ling-Yan Chen、Hao Zheng、Zhang-Rui Li、Qing-Chun Song、Ya Li