82259-09-4Relevant articles and documents
Synthesis of 5-Substituted 2-Pyrrolidinones by Coupling of Organozinc Reagents with Cyclic N-Acyliminium Ions
Hidalgo-Mercado, Yazmín I.,Olivo, Horacio F.,Romero-Ortega, Moisés,Santos-Sánchez, Zaira A.,Zaragoza-Galicia, Ivann
, p. 4650 - 4656 (2019/12/11)
A coupling reaction between cyclic N-acyliminium ions with organozinc reagents is described. The cyclic N-acyliminium ions, generated in situ from N-substituted-5-hydroxy-2-pyrrolidinones by treatment with boron trifluoride-diethyl ether complex or titani
A versatile enantioselective synthesis of azabicyclic ring systems: A concise total synthesis of (+)-grandisine D and unnatural analogues
Fadeyi, Olugbeminiyi O.,Senter, Timothy J.,Hahn, Kristopher N.,Lindsley, Craig W.
supporting information; experimental part, p. 5826 - 5831 (2012/06/29)
Closing in on azacines: We have developed a new six step approach for the rapid and enantioselective synthesis of indolizidine, pyrrolo[1,2-a]azepine, and pyrrolo[1,2-a]azocine azabicyclic systems and their respective lactam congeners, which are found in a host of natural products as well as pharmaceutical preparations. This protocol enables a concise enantioselective total synthesis of (+)-grandisine D in 16.4 % overall yield from commercial materials (see scheme). Copyright
Stereoselective conjugate addition of lactams to nitroalkenes and formal total synthesis of indolizidine 167B
Kamimura, Akio,Nagata, Yoshiaki,Kadowaki, Ayako,Uchida, Kosuke,Uno, Hidemitsu
, p. 11856 - 11861 (2008/03/13)
Optically active 5-substituted pyrrolidin-2-ones underwent conjugate addition to nitroalkenes to give the corresponding adducts in a diastereoselective manner. The presence of 18-crown-6 was crucial to achieve good stereoselective addition. Addition of 6-substituted piperidin-2-ones also gave the corresponding adduct in a stereoselective manner. The adduct was readily converted into a bicyclic lactam through intramolecular nitroaldol reaction, and the formal synthesis of indolizidine 167B was achieved.