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Coupling of Alkynes on a Pd−Pd Bond to Generate an Electrophilic μ ‐Butenediylidene Moiety
Author(s) -
Murahashi Tetsuro,
Otani Toshiaki,
Okuno Taketoshi,
Kurosawa Hideo
Publication year - 2000
Publication title -
angewandte chemie international edition
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 5.831
H-Index - 550
eISSN - 1521-3773
pISSN - 1433-7851
DOI - 10.1002/(sici)1521-3773(20000204)39:3<537::aid-anie537>3.0.co;2-s
Subject(s) - moiety , electrophile , chemistry , coupling (piping) , palladium , medicinal chemistry , stereochemistry , catalysis , organic chemistry , materials science , metallurgy
The first dipalladium μ ‐PPh 3 complex (1) was obtained by the facile loss of two CH 3 CN ligands from [Pd 2 (PPh 3 ) 2 (CH 3 CN) 4 ](PF 6 ) 2 in CH 2 Cl 2 . Coupling of p ‐tolylacetylene ( p ‐TolC≡CH) with 1 or its precusor afforded the μ ‐butenediylidene complex 2 , treatment of which with CH 3 CN resulted in PPh 3 migration to give 3 .