STUDIES ON ORGANOPHOSPHORUS COMPOUNDS VI1–5: Utility of Lawesson's Reagent for Synthesis of Thiaphosphorine, Thioxanthene, and Thiaphosphole Derivatives
摘要:
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.
Spectrophotometric Determination and Kinetic Studies of Condensation of Aromatic Aldehydes with 7,9-Dioxo-6,10-dioxaspiro[4.5]decane
作者:H. A. A. Medien、A. A. Zahran、A. W. Erian
DOI:10.1002/jccs.200400022
日期:2004.2
10-dioxaspiro[4.5]decane with aromatic aldehydes in chloroform in the presence of piperidine has been investigated spectrophotometrically at 25-50 °C. The reaction follows overall second order kinetics, first order in each of the reactants and zero order with respect to piperidine. The rate of condensation increases with the presence of electron withdrawing groups on the aromatic ring of the aldehyde. From
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.