Conjugate Addition Reactions of <i>N</i>-Carbamoyl-4-pyridones and 2,3-Dihydropyridones with Grignard Reagents in the Absence of Cu(I) Salts
作者:Fenghai Guo、Ramesh C. Dhakal、R. Karl Dieter
DOI:10.1021/jo400936z
日期:2013.9.6
4-addition reactions with Grignardreagents in the presence of chlorotrimethylsilane (TMSCl) or BF3·Et2O in excellent yields. Copper catalysis is not required, and mechanistic considerations suggest that the reaction is proceeding by a conjugate addition pathway rather than by a pathway involving 1,2-addition to an intermediate pyridinium ion. TMSCl-mediated conjugate addition of Grignardreagents to 2-substituted-2
[2 + 2] Photochemical Cycloaddition/Ring Opening of 6-Alkenyl-2,3-dihydro-4-pyridones
作者:James J. Sahn、Daniel L. Comins
DOI:10.1021/jo101276q
日期:2010.10.1
from 2,3-dihydro-4-pyridones, an unexpected product was obtained in the SET ring-opening reaction of photocycloadduct 1. Differences in reactivity between homologues 1 and 2 were observed in the presence of SmI2. Tricyclic ketone 2 afforded azaspiro[5.5]undecane 15 when treated with SmI2; however, when ketone 1 was submitted to similar reaction conditions a double ring-opening/reduction sequence gave
The present invention provides a compound of formula (I):
wherein the variants R1, R2, R3, R4, R5, R6, R7 are as defined herein, and wherein said compound is an inhibitor of CETP, and thus can be employed for the treatment of a disorder or disease mediated by CETP or responsive to the inhibition of CETP.