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Home / Phosphorus, Sulfur, and Silicon and the Related Elements, Volume 181, Number 2

Synthesis of New Heterocyclic Compounds Using Lawesson Reagent

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Authors: El-Kateb, Ahmed; Abd El-Rahman, Naglaa

Source: Phosphorus, Sulfur, and Silicon and the Related Elements, Volume 181, Number 2, Number 2/February 2006, pp. 249-254(6)

Publisher: Taylor and Francis Ltd

DOI: https://doi.org/10.1080/104265090970197

Lawesson reagent 1 reacts with Mannich bases of -naphthol 2 and 8 -hydroxyquinoline 4 to give oxthiaphosphinine- 3 -sulfide derivatives 3 and 5, respectively. Reaction of 1 with benzaldehyde in the presence of trialkyl phosphite yields 1,3,5,2-trithiaphosphinane-2-sulfide derivative 8 and, in the presence of ethyl acrylate, affords 2,4,6-triphenyl-1,3,5-trithiane 9. A mechanism is proposed to explain the formation of adduct 3.

Keywords: Lawesson reagent; Mannich bases; benzaldehyde; ethyl acrylate; trialkyl phosphite

Document Type: Research Article

Affiliations: Department of Pesticide Chemistry, National Research Centre, Dokki, Cairo, Egypt

Publication date: 01 February 2006

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