Allylsilane-interrupted homo-Nazarov cyclization and synthesis of bicyclo[3.2.1]octan-8-ones
摘要:
The combination of homo-Nazarov cyclization of 2-(tert-butyldiphenylsilylmethyl)cyclopropyl vinyl ketone leading to oxyallyl cation and its subsequent [3+2] capture by allylsilane has been demonstrated as an useful strategy for the construction of functionalized bicyclo[3.2.1]octan-8-ones. The [3+2] capture proceeds exclusively in the exo mode to make the overall reaction diastereoselective. The less substituted end of the oxyallyl cation was found to react nearly two times faster than the more substituted end. (c) 2014 Elsevier Ltd. All rights reserved.
Asymmetric Synthesis of Arylpropionic Acids and Aryloxy Acids by Using Lactamides as Chiral Auxiliaries
作者:Alessandra Ammazzalorso、Rosa Amoroso、Giancarlo Bettoni、Barbara De Filippis、Marialuigia Fantacuzzi、Letizia Giampietro、Cristina Maccallini、Maria L. Tricca
DOI:10.1002/ejoc.200600484
日期:2006.9
resolution methods have been applied for the asymmetricsynthesis of pharmaceutical arylpropionic acids and aryloxy acids by using amides of (S)-lactic acid as chiralauxiliaries. For arylpropionic acids the esterification mediated by dicyclohexylcarbodiimide (DCC) and 4-(dimethylamino)pyridine (DMAP) proceeds with good asymmetric induction, while for aryloxyacetic acids the key-step is a diastereoselective
�ber einige ?-substituierte Fetts�ureamide mit lokalan�sthetischer Wirkung
作者:A. E. Wilder Smith、Emil Hofstetter
DOI:10.1002/hlca.19550380502
日期:——
The preparation and properties of further fatty acid anilides showing anaesthetic action are described and the relationship between chemical constitution and physiological effect is discussed. Two very active compounds having relatively low toxicities have been discovered, namely:-
Synthesis of Alkylaminoalkylamides of Substituted 2-Aminopyrroles as Potential Local Anesthetic and Antiarrhythmic Agents II: β-Amines
作者:J.Walter Sowell、Alan J. Block、Mary Elizabeth Derrick、John J. Freeman、Joseph W. Kosh、Philip F. Mubarak、Paul A. Tenthorey
DOI:10.1002/jps.2600700519
日期:1981.5
The synthesis, localanesthetic and antiarrhythmic properties, and CNS toxicity of 14 2-(3-alkylaminoalkylamido)-pyrroles are described. Most of the compounds exhibited localanesthetic activity by the guinea pig wheal test, with seven showing comparable or greater activity than lidocaine. Most compounds also exhibited antiarrhythmic activity; three compounds had more potent activity than lidocaine