Visible light initiates the stereoselective formation of two new bonds, a CC and a CSi bond, during the addition of acylsilanes to alkynes. At room temperature this photochemicallyinduced transformation can be applied for the preparation of chromone derivatives in a highly atom-economic manner.
Increasing the affinity of calstabin-2 for the cardiac calcium channel RyR2 and thereby stabilizing the channel in the closed state has recently been identified as novel mechanism for treating heart failure, particularly ventricular arrhythmias. JTV-519, a 1,4-benzothiazepine derivative, has been shown to stabilize the calstabin2/RyR2 complex. Novel derivatives of JTV-519 that may be useful in treatment or prevention of heart failure, atrial fibrillation, or exercise-induced cardiac arrhythmias are provided. Synthetic methodology and intermediates in the synthesis of the inventive JTV-519 derivatives are also described.
Enantioselective Synthesis of Chromanones Bearing Quaternary Substituted Stereocenters Catalyzed by (1<i>R</i>)-Camphor-Derived <i>N</i>-Heterocyclic Carbenes
作者:Zbigniew Rafiński、Anna Kozakiewicz
DOI:10.1021/acs.joc.5b01029
日期:2015.8.7
A catalytic asymmetric intramolecular crossed-benzoin reaction for the synthesis of chromanones by novel camphor-derived N-heterocyclic carbenes is described. The corresponding chromanones bearing quaternary stereogenic centers were isolated in high yields with high to excellent enantioselectivity.
KRUSE C. G.; WIJSMAN A.; GEN A. VAN DER, J. ORG. CHEM., 1979, 44, NO 11, 1847-1851
作者:KRUSE C. G.、 WIJSMAN A.、 GEN A. VAN DER
DOI:——
日期:——
GASSMAN P. G.; AMICK D. R., SYNTH. COMMUN., 1975, 5, NO 5, 325-329