STUDIES ON ORGANOPHOSPHORUS COMPOUNDS VI<sup>1–5</sup>: Utility of Lawesson's Reagent for Synthesis of Thiaphosphorine, Thioxanthene, and Thiaphosphole Derivatives
作者:Nadia R. Mohamed、Manal M. T. El-Saidi、Tayseer A. Abdallah、Afaf A. Nada
DOI:10.1080/10426500490485200
日期:2004.11.1
Arylidene malonate derivatives 2a-c reacted with Lawesson's reagent (1) LR in equimolar ratio to yield the oxathiaphosphorine derivatives 3a-c. The behaviour of LR towards cyclic ketones was also examined and yielded the thioxanthene derivatives 5a,b. On the other hand, arylidene pyrazolone 8 reacted with LR to give the phosphole 10. Aminobenzenethiophene 11 reacted with LR under reflux to produce the corresponding thiazaphosphorine 12.
Selective Reduction of the Exocyclic Double Bond of Isoxazolones and Pyrazolones by Hantzsch 1,4-Dihydropyridine
作者:Wei Yu、Zhengang Liu、Bing Han、Qiang Liu、Wei Zhang、Li Yang、Zhong-Li Liu
DOI:10.1055/s-2005-869860
日期:——
Hantzsch 1,4-dihydropyridine (HEH) was used to realize the selective reduction of the exocyclic double bond of 4-arylmethylene- and 4-alkylidene-4H-isoxazol-5-ones and 4-arylmethylene-4H-pyrazol-5-ones.