New Intermediates in the Cyclocotrimerization of Thioxophosphorus( V ) Cations with Alkynes | Zendy

Lindner Ekkehard | Zendy; Käss Volker | Zendy; Hiller Wolfgang | Zendy; Fawzi Riad | Zendy

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New Intermediates in the Cyclocotrimerization of Thioxophosphorus( V ) Cations with Alkynes

Author(s) -

Lindner Ekkehard,

Käss Volker,

Hiller Wolfgang,

Fawzi Riad

Publication year - 1989

Publication title -

angewandte chemie international edition in english

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 5.831

H-Index - 550

eISSN - 1521-3773

pISSN - 0570-0833

DOI - 10.1002/anie.198904481

Subject(s) - substituent , dimethyl acetylenedicarboxylate , chemistry , medicinal chemistry , hexane , stereochemistry , organic chemistry , catalysis , cycloaddition

A thiaphosphametallacyclopropane and a thiaphosphametallacycloheptadiene are important intermediates for understanding the mechanism of the cyclotrimerization of thioxophosphorus( V ) cations and alkynes. These species are accessible by use of a bulky substituent R at the phosphorus atom. Compounds 2 are formed from the metallacyclopropane 1 and dimethyl or diethyl acetylenedicarboxylate in hexane. Upon heating in THF, they lose CO and are transformed into the known metallabicycloheptadienes 3 . R 1 = cyclohexyl; R 2 = CO 2 Me, CO 2 Et.

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