Regioselective synthesis of piperidinones by metal-catalyzed ring expansion-carbonylation reactions. Remarkable cobalt and/or ruthenium carbonyl catalyzed rearrangement and cyclization reactions
作者:Ming De Wang、Howard Alper
DOI:10.1021/ja00044a010
日期:1992.8
Carbonylation of pyrrolidines, catalyzed by cobaltcarbonyl, results in the formation of piperidinones. The reaction is regiospecific in most cases, and the yield of product is increased when rutheniumcarbonyl is present as a second catalyst. The dual catalytic system [Co 2 (CO) 8 /Ru 3 (CO) 12 ] is useful for the novel rearrangement of heterocyclic nitrogen ketones ((CH 2 ) n NCH 2 COR, n=4-7] to
Radical condensation between benzylic alcohols and acetamides to form 3-arylpropanamides
作者:Kobra Azizi、Robert Madsen
DOI:10.1039/d0sc02948c
日期:——
A new radical condensation reaction is developed where benzylic alcohols and acetamides are coupled to generate 3-arylpropanamides with water as the only byproduct. The transformation is performed with potassiumtert-butoxide as the only additive and gives rise to a variety of 3-arylpropanamides in good yields. The mechanism has been investigated experimentally with labelled substrates, trapping experiments
Lewis acid-promoted nitroolefination of enol silyl ethers has been developed. Enol ethers 1, 4, 5, and 6 derived from lactones and lactams furnished nitroolefines 2, 7, 8, and 9, respectively in 60-99% yields by the treatment with 3 in the presence of Lewis acids. Asymmetric nitroolefination of 5a and 6a with 12 gave 8a and 9a in 75% and 73% ee, respectively.
Lactam and thiolactam derivatives as anesthetic and conscious sedation agents
申请人:——
公开号:US20030078283A1
公开(公告)日:2003-04-24
This invention relates to lactam and thiolactam derivatives having useful anesthetic and conscious sedation activity. Particularly useful compounds include the diethyl lactams such as 3,3-diethyl-2-pyrrolidinone. Methods for using these compounds and pharmaceutical compositions containing these compounds are provided.