A Simple and Highly Diastereoselective One-Pot Synthesis of 1,3-Diamines
作者:Beatrix Merla、Michael Arend、Nikolaus Risch
DOI:10.1055/s-1997-729
日期:1997.2
A convenient one-pot procedure for the highly diastereoselective synthesis of 1,3-diamines 4 from inexpensive starting materials is described. Enamines 2 are aminoalkylated with preformed ternary iminium salts 1 yielding exclusively the quaternary iminium salts 3. In situ reduction of 3 with NaBH4/MeOH provides a broad access to the diastereomerically pure 1,3-diamines 4 in moderate to good yields.
The invention relates to substituted 1 and 2 naphthol Mannich bases, a method for the production thereof, medicaments containing said compounds and the use of said compounds in the production of medicaments.
The invention relates to substituted indole Mannich bases of formula (I), a method for the production thereof, medicaments containing said compounds and the use of said compounds in the production of medicaments, especially medicaments that are used to treat pain. In formula (I), R1,R2, R4-R7 have the meanings cited in claim 1, R3=formula (a) and R13=(substituted) phenyl.
development of a simple and highly selective method for the preparation of substituted U-shaped terpyridines is described. The treatment of imine 5 with ternary iminium salts 2 leads to the terpyridines 4. A possible mechanism is discussed. The terpyridine derivatives are used for the preparation of several platinum(II) complexes 14. Complex 14e is characterized by single-crystal X-ray analysis.
Zur Aminomethylierung von 1-Cyan-isochroman und 1-Cyan-isothio-chroman. 16. Mitt. über Untersuchungen in der Isochroman- und Isothiochroman-Reihe, zugleich 46. Mitt. über α-halogenierte Amine
作者:H. Böhme、F. Ziegler
DOI:10.1002/ardp.19743070409
日期:——
1‐Cyan‐isochroman (1a) und 1‐Cyan‐isothiochroman (1i) lassen sich über ihre Carbanionen 2 mit α‐halogenierten Aminen 3 zu den Dialkylaminomethyl‐ bzw. Dialkylaminobenzyl‐Verbindungen 4 aminomethylieren.