53663-25-5Relevant academic research and scientific papers
Ind2TiMe2-catalyzed addition of methyl- and ethylamine to alkynes
Marcsekova, Klaudia,Wegener, Bernd,Doye, Sven
, p. 4843 - 4851 (2007/10/03)
We describe a very simple hydrogenation-like experimental protocol for the addition of gaseous methyl- and ethylamine to alkynes in the presence of Ind2TiMe2 as the catalyst. For efficient hydroamination reactions it is sufficient to stir a mixture of the alkyne and the catalyst in toluene at temperatures between 80°C (terminal alkynes) and 105°C (internal alkynes) under a constant pressure of 1 atm of the corresponding amine. After subsequent reduction of the initially formed imines, methyl- and ethylamine derivatives are the final products of the described one-pot reaction sequences. In the case of 2-alkyl-1-phenylalkynes as starting materials, biologically interesting 2-phenylethylamine derivatives possessing a small methyl or ethyl substituent at the N atom are easily accessible by the new reaction protocol. Wiley-VCH Verlag GmbH & Co. KGaA, 2005.
Cerium(IV) oxidations of β-aminoketones, VIII: Synthesis of 1,2,3,4-tetrahydroisoquinolines with differently substituted piperidine parts
Holzgrabe,Inkman
, p. 209 - 215 (2007/10/02)
1- and 3-Alkyl- and/or aryl substituted tetrahydroisoquinolines are obtained by oxidative cyclisation of N-benzyl-β-aminoketones with cerium(IV) sulphate. In nearly all cases formation of mixtures of diastereomeres is observed. If the ketone function is r
2-azacyclocarboxamide derivatives
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, (2008/06/13)
Compounds are provided of the following general structure: STR1 wherein A is 2-pyrrolidinyl, 2-piperidinyl or 4-thiazolidinyl and R and R1 are independently selected from hydrogen and methyl. They are useful for providing sedative and antiepile
2-[(2-aminoacetyl)amino]acetamide derivatives
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, (2008/06/13)
Compounds are provided of the following general structure: STR1 wherein R1, R2, R3 and R4 are hydrogen or methyl and where R5 and R6 are independently selected from hydrogen or fluorine. Th
Novel Zinc-Promoted Alkylation of Iminium Salts. New Synthesis of Benzylisoquinoline, Phthalidylisoquinoline, and Protoberberine Alkaloids and Related Compounds
Shono, Tatsuya,Hamaguchi, Hiroshi,Sasaki, Manji,Fujita, Shumei,Nagami, Kimihiko
, p. 1621 - 1628 (2007/10/02)
Zinc-promoted reductive coupling reaction of iminium salts with alkyl halides was found to be a successful key reaction for synthesis of a variety of alkaloids such as benzylisoquinoline, phthalidylisoquinoline, and protoberberine alkaloids.More specifically, laudanosine, cordrastine, hydrastine, narcotine, tetrahydropalmatine, and canadine were obtained.A new route for the synthesis of the emetine and yohimbine skeletons was exploited.
