cheminform abstract: sulfur and selenium derivatives of 2-phosphaindolizines

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1998 organo-phosphorus compounds, nonmetal heterocycles organo-phosphorus compounds, nonmetal heterocycles S 0087 40 - 190 Sulfur and Selenium Derivatives of 2-Phosphaindolizines. — The new zwitterionic heterocyclic systems (II) are obtained by reaction of title indolizines (I) with hydrogen sulﬁde and sulfur. The reaction fails without hydrogen sulﬁde. The analogous diselenophosphinate (VIII) is prepared from (Ic) and the preparatively more convenient compound (Va), in the absence of an additional base. Phosphaindolizine (Ic) reacts with diselenides (V) giving the new diselenophosphinates (VII). This reaction is extended to phosphaindolizine derivative (X). — (BANSAL, R. K.; GUPTA, N.; BHARATIYA, N.; GUPTA, G.; SURANA, A.; HACKENBRACHT, G.; KARAGHIOSOFF, K.; Heteroat. Chem. 9 (1998) 4, 445-452; Dep. Chem., Univ. Rajasthan, Jaipur 302 004, India; EN) 1

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Page 1: ChemInform Abstract: Sulfur and Selenium Derivatives of 2-Phosphaindolizines

1998 organo-phosphorus compounds, nonmetal heterocycles

organo-phosphorus compounds, nonmetal heterocyclesS 0087

40 - 190Sulfur and Selenium Derivatives of 2-Phosphaindolizines. — Thenew zwitterionic heterocyclic systems (II) are obtained by reaction of titleindolizines (I) with hydrogen sulfide and sulfur. The reaction fails withouthydrogen sulfide. The analogous diselenophosphinate (VIII) is prepared from(Ic) and the preparatively more convenient compound (Va), in the absence of anadditional base. Phosphaindolizine (Ic) reacts with diselenides (V) giving thenew diselenophosphinates (VII). This reaction is extended to phosphaindolizinederivative (X). — (BANSAL, R. K.; GUPTA, N.; BHARATIYA, N.; GUPTA,G.; SURANA, A.; HACKENBRACHT, G.; KARAGHIOSOFF, K.; Heteroat.Chem. 9 (1998) 4, 445-452; Dep. Chem., Univ. Rajasthan, Jaipur 302 004,India; EN)

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Page 2: ChemInform Abstract: Sulfur and Selenium Derivatives of 2-Phosphaindolizines

1998 organo-phosphorus compounds, nonmetal heterocycles

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