111599-07-6Relevant articles and documents
Copper-Catalyzed Cyanomethylation of Substituted Tetrahydroisoquinolines with Acetonitrile
Zhang, Wei,Yang, Shiping,Shen, Zengming
, p. 2392 - 2397 (2016/08/16)
A novel method for the synthesis of cyanomethylated tetrahydroisoquinolines has been developed with mild reaction conditions, good yields and a broad substrate scope. Acetonitrile, a common solvent, is for the first time used as a pronucleophile for this type of two sp3C?H bonds cross-dehydrogenative coupling (CDC) reaction. A new oxidative system (CuCl2/TEMPO/Cs2CO3) has been established by our group, in which the mild TEMPO reagent was found to be a highly efficient oxidant. (Figure presented.).
Novel High Energy Intermediate Analogues with Triazasterol-Related Structures as Potential Inhibitors of the Ergosterol Biosynthesis II [1]. Optimization of the Synthesis of 1,6,7,11b-Tetrahydro-2H-pyrimido[4,3-a] isoquinolin-4-amines as Parent Compounds of Novel 8,13,15-Triazasteroids
Goessnitzer, Edith,Punkenhofer, Asbjoern
, p. 909 - 927 (2007/10/03)
Summary. Various routes for an effective synthesis of 1,6,7,11b-tetrahydro- 2H-pyrimido[4,3-a]isoquinolin-4-amine and its 9-methoxy derivative, which were designed as tricyclic triaza-analogues with stable positive charge to mimic carbocationic high energy intermediates (HEI) of the ergosterol biosynthesis, were investigated. Starting from β-phenylethylamines the corresponding 3-chloro-N-phenethylpropionamides were prepared and transformed into N-phenethyl-3-phthalimidopropionamides. These amides were cyclized via Bischler-Napieralski reaction to yield after hydrolytic deprotection 1-(aminoethyl)tetrahydroisoquinolines. The 1,6,7,11b-tetrahydro-2H-pyrimido[4,3- a]isoquinoline ring system was then built up by condensation of the bicyclic diamines with various carbonic acid derivatives (carbon disulfide, nitroguanidine, tetraethyl orthocarbonate). Along with the applied reaction sequences unexpected side reactions took place. The structures of all isolated compounds were proven and completely assigned on the basis of homo- and heteronuclear correlated 1D and 2D NMR experiments. The in vitro antifungal susceptibility tests with a standard panel of eight pathogenic fungi revealed only weak antimycotic effects of the pyrimidoisoquinolinamine salts, but strong inhibitory activity of the intermediate 1-(aminoethyl)-3,4-dihydroisoquinoline.
The Reaction of 3,4-Dihydroisoquinolines With Malonic Acid and Its Derivatives
Pelletier, Jeffrey C.,Cava, Michael P.
, p. 474 - 477 (2007/10/02)
The reaction of various 3,4-dihydroisoquinolines with malonic acid gives the corresponding 1,2,3,4-tetrahydro-1-isoquinolineacetic acids in good yield, while the reaction with cyanoacetic acid and malonic acid half ethyl ester affords 1,2,3,4-tetrahydro-1