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Original Articles

α-SUBSTITUIERTE PHOSPHONATE 66.1 ZUR REAKTION VON BENZOPYRYLIUM-BZW. FURYLCHLORIDEN MIT TRIVALENTEN PHOSPHORVERBINDUNGEN

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Pages 129-134 | Received 06 Jul 1993, Published online: 23 Sep 2006
 

Abstract

Benzpyryliumchloride reagieren mit Triethylphosphit bzw. mit Diphenylphosphonigsäureisopropylester unabhängig von der Stellung des Substituenten im Pyryliumring ausschließlich in 4-Position. 2-(Chlor-diethylphosphonomethyl)-furan 12 dagegen gibt mit Triethylphosphit ein Gemisch des erwarteten gem. Bisphosphonates 14 und der kernphosphorylierten Verbindung 15.

Benzopyrylium chlorides and triethylphosphite or diphenylphosphinic acid isopropylester react independent of the position of substituents in the pyrylium ring only in 4-position. On the other hand 2-(chlorodiethylphosphono methyl)-furane 12 with triethylphosphite gives a mixture of the expected gem. bisphosphonate 14 and the product with the second diethylphosphono group in the furane ring (15).

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