1,3-Diphenylpropane-1,3-diamines XI. Conversion of a 3-hydroxy-1,3-diphenylpropan-1-one to 1,3-diphenylpropane-1,3-diamines

Autor: Wolfgang Wiegrebe, A. Kaiser, P. Bielmeier
Rok vydání: 1997
Předmět:
Zdroj: Monatshefte f�r Chemie Chemical Monthly. 128:1247-1254
ISSN: 1434-4475
0026-9247
Popis: Highly diastereoselective BH3/THF syn-reduction of the 3-hydroxy-1,3-diphenylpropan-1-one/BBr3 complex3/BBr3 (cf.Sarko) afforded themeso-diol4, whereas racemate5 was obtained by BH3/THF reduction without complexation. Mesylation, exchange of mesylate by azide, and reduction with SnCl2/thiophenol led to the diamines10 and11 which were also produced by reductive N-N cleavage of the 4,5-dihydropyrazole13.
Databáze: OpenAIRE