在这项研究中,我们首次开发了一种有效的合成1,2-二氢喹啉和二氢苯并[ b ]氮杂衍生物的方法,该方法涉及氯化铁(III)的分子内炔烃-羰基复分解反应。在环境友好且廉价的氯化铁(III)(10 mol%)的存在下,在温和的条件下,由易于获得的底物制备了各种官能化的1,2-二氢喹啉和二氢苯并[ b ]氮杂s 。该方法适用于范围广泛的包含不同官能团的基材,并以高至优异的产率提供了装饰产品。该方法进一步扩展到一个一锅法合成的3-酰基喹啉通过通过添加NaOH / EtOH ,N-炔丙基-2-氨基苯甲醛/苯乙酮衍生物进行炔烃-羰基复分解/脱甲苯基化/芳构化。尽管对许多路易斯酸和布朗斯台德酸催化剂进行了研究,但无水氯化铁(III)却是该转化的最佳催化剂。
Compounds of the formula:
are useful in treating disease conditions mediated by TNF-&agr;, such as rheumatoid arthritis, osteoarthritis, sepsis, AIDS, ulcerative colitis, multiple sclerosis, Crohn's disease and degenerative cartilage loss.
作者:Vera J. Meyer、Liang Fu、Fabian Marquardt、Meike Niggemann
DOI:10.1002/adsc.201300253
日期:2013.7.8
A cycloisomerization of enynes with a benign calcium catalyst is presented exploring a complementary reactivity to that usually found in transition and noble metal‐catalyzed reactions. Thereby, a systematic investigation of the π‐activation of alkynes with reactive carbocations has been realized and ketones of various ring sizes were easily accessed. We are certain that these basic investigations will
Rhodium(<scp>i</scp>)-catalyzed Pauson–Khand-type reaction using formic acid as a CO surrogate: an alternative approach for indirect CO<sub>2</sub> utilization
作者:Xian-Dong Lang、Fei You、Xing He、Yi-Chen Yu、Liang-Nian He
DOI:10.1039/c8gc03933j
日期:——
(PK-type) reaction of various substituted 1,6-enynes to afford bicyclic cyclopentenones in moderate to good yields. High TON value of up to 263 and good results in the gram-scale experiment were also obtained, demonstrating the efficacy of this methodology. In addition, heterocyclic molecules of pharmaceutical importance were also furnished via inter- or intra-molecular hetero-PK-type reactions, further
Diversity Oriented Synthesis of Indoloazepinobenzimidazole and Benzimidazotriazolobenzodiazepine from<i>N</i><sup>1</sup>-Alkyne-1,2-diamines
作者:Ravi Kumar、Rajesh K. Arigela、Srinivas Samala、Bijoy Kundu
DOI:10.1002/chem.201502956
日期:2015.12.14
oriented synthesis of two N‐polyheterocycles indoloazepinobenzimidazole and benzimidazotriazolobenzodiazepine from a common N1‐alkyne‐1,2‐diamine building block is described. The approach involves sequential formation of benzimidazole through cyclocondensation and oxidation, which is followed by the formation of either an azepine ring (through alkyne activation and 6‐endo‐dig cyclization, 1,2‐migration
The present invention relates to new tricyclic triazolic compounds having a high affinity for sigma-1 receptor as well as to the process for the preparation thereof, to composition comprising them and to their use as medicaments according to compounds of formula (I)
Wherein R1 and R2 are as defined in the description.