2-Hydroxy-3-nitro-1,4-naphthoquinones for the prophylaxis of certain
申请人:Beecham Group Limited
公开号:US04017639A1
公开(公告)日:1977-04-12
Substituted naphthoquinones of the formula (I) and pharmaceutically acceptable salts thereof wherein R.sub.1, R.sub.2, R.sub.3 and R.sub.4 represent alkyl, aryl, alkoxy, hydroxy, hydrogen or halogen or any two of the groups R.sub.1, R.sub.2, R.sub.3 and R.sub.4 taken together complete a carbocyclic ring, have useful anti-allergy activity in mammals.
Copper(I)-Mediated Divergent Synthesis of Pyrroquinone Derivatives and 2-Halo-3-amino-1,4-quinones
作者:Bei Wang、Hong Xu、Fu-Yu Li、Ji-Yu Wang
DOI:10.1021/acs.joc.3c00325
日期:2023.7.7
divergent transformation of 2-amino-1,4-quinones for the synthesis of pyrroquinone derivatives and 2-halo-3-amino-1,4-quinones was disclosed. The mechanistic study showed that both the tandem cyclization and halogenation involved a Cu(I)-catalyzed oxidative radical process. This protocol not only constructed a series of novel pyrroquinone derivatives with high atom economy but also provided a new method
公开了用于合成吡咯醌衍生物和2-卤代-3-氨基-1,4-醌的2-氨基-1,4-醌的发散转化。机理研究表明串联环化和卤化均涉及Cu(I)催化的氧化自由基过程。该方案不仅构建了一系列具有高原子经济性的新型吡咯醌衍生物,而且提供了一种以 CuX (X = I , Br, Cl) 作为 X (X = I、Br、Cl) 来源。
BUCKLE D. R.; CANTELLO B. C. C.; SMITH H.; SMITH R. J.; SPICER B. A., J. MED. CHEM. <JMCM-AR>, 1977, 20, NO 8, 1059-1064
作者:BUCKLE D. R.、 CANTELLO B. C. C.、 SMITH H.、 SMITH R. J.、 SPICER B. A.
DOI:——
日期:——
Synthesis and antiallergic activity of 2-hydroxy-3-nitro-1,4-naphthoquinones
作者:Derek R. Buckle、Barrie C. C. Cantello、Harry Smith、Raymond J. Smith、Barbara A. Spicer
DOI:10.1021/jm00218a014
日期:1977.8
have highest potency with alkyl substitution at both C-6 and C-7. The most potent compounds were 7c and 7e which produced a 50% inhibition in the rat PCA test at doses of about 10 micrometerM/kg following subcutaneous administration and showed activity after oral administration. Related 4-hydroxy-3-nitro-2(1H)-naphthalenones had no effect on rat PCA in doses up to 500 micrometerM/kg.
Substituted naphthoquinones of the formula (I) and pharmaceutically acceptable salts thereof wherein R.sub.1, R.sub.2, R.sub.3 and R.sub.4 represent alkyl, aryl, alkoxy, hydroxy, hydrogen or halogen or any two of the groups R.sub.1, R.sub.2, R.sub.3 and R.sub.4 taken together complete a carbocyclic ring, have useful anti-allergy activity in mammals.