Spiro Derivatives of Tetrahydrothiophene. Synthesis of the Quinolizidine <3-spiro-2′> tetrahydrothiophene System Using Solid/Liquid or Liquid/Liquid Phase-Transfer Catalysis
Spiro Derivatives of Tetrahydrothiophene. Synthesis of the Quinolizidine <3-spiro-2′> tetrahydrothiophene System Using Solid/Liquid or Liquid/Liquid Phase-Transfer Catalysis
WROBEL J. T.; HEJCHMAN E., SYNTHESIS,(1987) N 5, 452-455
作者:WROBEL J. T.、 HEJCHMAN E.
DOI:——
日期:——
Spiro Derivatives of Tetrahydrothiophene. Synthesis of the Quinolizidine <3-spiro-2′> tetrahydrothiophene System Using Solid/Liquid or Liquid/Liquid Phase-Transfer Catalysis
作者:Jerzy T. Wróbel、Elżbieta Hejchman
DOI:10.1055/s-1987-33430
日期:——
4-Oxooctahydroquinolizine<3-spiro-2′>tetrahydrothiophene 1′,1′-dioxide can be synthetized from 2-cyanotetrahydrothiophene by two independent routes, both of them using phase-transfer catalysis: the first one involves alkylation of 2-cyanotetrahydrothiophene under PTC conditions, the second one N-acylation of 2-(2-chloroethyl)piperidine with 2-chlorocarbonyltetrahydrothiophene with the final cycloalkylation being performed under PTC conditions. Two stereoisomers of the spiro compound are obtained.