in silico Design, ADME Prediction, Molecular Docking, Synthesis of Novel Triazoles,
Indazoles & Aminopyridines and in vitro Evaluation of Antitubercular Activity
in silico Design, ADME Prediction, Molecular Docking, Synthesis of Novel Triazoles,
Indazoles & Aminopyridines and in vitro Evaluation of Antitubercular Activity
Isothiourea-catalysed enantioselective pyrrolizine synthesis: synthetic and computational studies
作者:Daniel G. Stark、Patrick Williamson、Emma R. Gayner、Stefania F. Musolino、Ryan W. F. Kerr、James E. Taylor、Alexandra M. Z. Slawin、Timothy J. C. O'Riordan、Stuart A. Macgregor、Andrew D. Smith
DOI:10.1039/c6ob01557c
日期:——
The catalytic enantioselective synthesis of a range of cis-pyrrolizine carboxylate derivatives with outstanding stereocontrol (14 examples, >95 : 5 dr, >98 : 2 er) through an isothiourea-catalyzed intramolecular Michael addition-lactonisation and ring-opening approach from the corresponding enone acid is reported. An optimised and straightforward three-step synthetic route to the enone acid starting
通过异硫脲催化的分子内迈克尔加成-内酯化和开环方法,催化对映选择性合成一系列具有出色立体控制性的顺式吡咯嗪羧酸盐衍生物(14个实例,>95 : 5 dr,>98 : 2 er )据报道烯酮酸。描述了一种从容易获得的吡咯-2-甲醛中制备烯酮酸起始材料的优化且简单的三步合成路线,其中苯并四咪唑(5 mol%)被证明是对映选择性过程的最佳催化剂。用MeOH或一系列胺对吡咯嗪二氢吡喃酮产物进行开环,以优异的收率和对映选择性获得所需的产物。计算已被用来探索导致高立体控制的因素,所观察到的顺式立体异构体的形成预计在动力学和热力学上是有利的。
Manganese(I)‐Catalyzed Chemoselective Transfer Hydrogenation of the C=C Bond in Conjugated Ketones at Room Temperature
作者:Dipesh M. Sharma、Anand B. Shabade、Rajesh G. Gonnade、Benudhar Punji
DOI:10.1002/chem.202301174
日期:2023.8
Chemoselective C=C bond transfer hydrogenation in α,β-unsaturated ketones is described using a cost-effective pincer-ligated manganese catalyst at roomtemperature.
4,6-Disubstituted-3-cyano-2-methylpyridines, easily prepared by treating alpha,beta-unsaturated carbonyl compounds with beta-aminocrotononitrile in the presence of potassium tert-butoxide, have been found to show intense fluorescence in the region of 400-552 nm. 3-Cyano-4,6-bis(4-methoxyphenyl)-and 3-cyano-4,6-di(2-furyl)-2-methylpyridines show more intense fluorescence than 7-diethylamino-4-methylcoumarin. The 3-cyano group of pyridines increases the fluorescence intensities and improves photostabilities.
Reinkhardt, M.; Mitina, V. G.; Pivnenko, N. S., Journal of general chemistry of the USSR, 1980, vol. 50, # 12, p. 2244 - 2249
作者:Reinkhardt, M.、Mitina, V. G.、Pivnenko, N. S.、Lavrushin, V. F.
DOI:——
日期:——
Pyrroles as C-nucleophiles in reactions with acylacetylenes
作者:B. A. Trofimov、Z. V. Stepanova、L. N. Sobenina、A. I. Mikhaleva、T. I. Vakul'skaya、V. N. Elokhina、I. A. Ushakov、D. -S. D. Toryashinova、E. I. Kositsyna
DOI:10.1007/bf02496409
日期:1999.8
The reactions of substituted pyrroles with terminal acylacetylenes occur selectively to form 2-(Z/E-2-acylvinyl)pyrroles. When the reactions are performed on the surface of silica gel, C-vinylation is noticeably accelerated to form predominantly E-isomers. ESR spectroscopy with the use of a spin trap demonstrated the ion-radical character of the process. The structures of the adducts synthesized, which exist as anti-s-cis- and syn-s-cis-rotamers, were studied by IR, UV, and NMR spectroscopy.