研究了分子内亲核芳族取代反应(称为Truce-Smiles重排)中底物中强电子吸收取代基对芳环活化的要求。初步的力学实验支持S N Ar机理,包括原位形成的Meisenheimer中间体的1 H和13 C NMR光谱。通常观察到重排对于具有强吸电子取代基(例如硝基,氰基和苯甲酰基官能团)的底物是成功的,但对于具有多个弱吸电子取代基(例如氯和溴官能团)的底物也是如此组。这些结果提供进一步的澄清的芳基取代基在这种类型的S的影响Ñ的Ar反应。另外,该调查还揭示了某些底物进行的一些串联环化和/或消除反应。
Polycyclic<i>N</i>-Heterocyclic Compounds 73: Synthesis and Evaluation of 5-Substituted 1,2-Dihydrofuro[2,3-<i>c</i>]isoquinolines as Inducers of Lipoprotein Lipase mRNA Expression
Several 5-substituted 1,2-dihydro[2,3-c]isoquinoline derivatives were synthesized as part of our research to develop new diabetes drugs. Amines and sulfanyls were used as substituents at the 5th-position. Evaluation of the effects of the newly synthesized compounds on lipoproteinlipasemRNAexpression in 3T3-L1 preadipocytes revealed one promising candidate with potency comparable to that of troglitazone
几种5-取代的1,2-二氢[2,3- c ]异喹啉衍生物被合成,作为我们开发新的糖尿病药物的研究的一部分。胺和硫烷基用作第5位的取代基。评估新合成的化合物对3T3-L1前脂肪细胞中脂蛋白脂肪酶mRNA表达的影响后,发现了一种有潜力的候选药物,其效力可与3T3-L1前脂肪细胞媲美。曲格列酮。
Polycyclic N-Heterocyclic Compounds. 57 Syntheses of Fused Furo(or Thieno)[2,3-b]pyridine Derivatives via Smiles Rearrangement and Cyclization
An efficient methodology for the synthesis of thieno[2,3-c][2,7] naphthyridine (6), thieno[2,3-c]isoquinoline (11), furo[2,3-c]isoquinoline (14), [1]benzothieno[3,2-d]thieno[2,3-b]pyridine (21), and [1]benzothieno[3,2-d]furo-2,3-b]pyridine (26) skeletons from 4-[o-cyanoarylthio(or oxy)]butyronitriles with base via Smiles type rearrangement reaction followed by the cyclization is described.
Polycyclic <i>N</i>-Heterocyclic Compounds 74: Rearrangement Reaction of 5-Amino-1,2-dihydrofuro[2,3-<i>c</i>]isoquinolines with <font>α</font>,<font>ω</font>-Dibromoalkanes and Evaluation of Product Bronchodilator Activity
Reaction of 5-amino-1,2-dihydrofuro[2,3-c]isoquinolines with 1,2-dibromoethane and 1,3-dibromopropane in the presence of a base afforded 2',3'-dihydrospiro[cyclopropane-1,6'(5'H)-imidazo[2,1-a]isoquinolin]-5'-ones land 3',4'-dihydro-2'H-spiro[cyclopropane-1,7'(6'H)-pyrimido[2,1-a]isoquinolin]-6'-ones, respectively. Certain of the products showed significant bronchodilator activity.