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Molbank, Volume 2005, Issue 4

October 2005 - 10 articles

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Articles (10)

  • Short Note
  • Open Access
1 Citations
2,782 Views
2 Pages

1 October 2005

In continuation of previous work on the polyfunctionally substituted 1H-pyrazolo[4,3-e][1,2,4]triazine [1,2] we have reported here preparation of 3-nitropyridin-2-yl hydrazone of 5-acetyl-3-phenyl-1,2,4-triazine 3 being valuable intermediate for the...

  • Short Note
  • Open Access
1 Citations
3,079 Views
2 Pages

1 October 2005

Semicarbazone as well as thiosemicarbazone of 5-acetyl-3-(methylsulfanyl)-1,2,4-triazine were synthesised as reactive intermediates for the synthesis of 1H-pyrazolo[4,3-e][1,2,4]triazine derivatives via acid promoted ring closure [1,2,3].[...]

  • Short Note
  • Open Access
2 Citations
2,690 Views
2 Pages

1 October 2005

The asymmetric synthesis of monocyclic β-lactams belong to five categories: a) asymmetric induction from the imine component; b) asymmetric induction from the ketene component; c) double stereodifferentiating cycloadditions; d) carbacephem intermedia...