Isomerisation of alpha-pinene oxide in the presence of indenyl allyl dicarbonyl molybdenum(II) and tungsten(II) complexes

authors	Bruno, SM; Gamelas, CA; Gomes, AC; Valente, AA; Pillinger, M; Romao, CC; Goncalves, IS
nationality	International
journal	CATALYSIS COMMUNICATIONS
author keywords	Indenyl complexes; Group 6 metals; Lewis acid catalysts; alpha-Pinene oxide; Isomerisation; Campholenic aldehyde
keywords	MEINWALD REARRANGEMENT REACTIONS; ORGANOMETALLIC LEWIS-ACIDS; PI-ALLYL; MIXED-RING; CATALYSTS; PRECURSORS; TETRAFLUOROBORATE; TRANSFORMATIONS; TUNGSTENOCENE; MOLYBDENOCENE
abstract	The indenyl complexes IndM(eta(3)-C3H5)(CO)(2) (M= Mo (1), W (2)), (IndMe)Mo(eta(3)-C3H5)(CO)(2) (3) and (IndSiMe(3))Mo(eta(3)-C3H5)(Co)(2) (4) display catalytic activity for the isomerisation of alpha-pinene oxide. Conversion reached 97% after 3 h at 35 degrees C in the presence of 1 and 1,2-dichloroethane as solvent, giving campholenic aldehyde in 56% yield. Solvent polarity and basicity appear to affect the reaction rate. Whereas the type of substituent on the indenyl ligand does not appear to have a strong impact on catalytic performance, changing the metal centre from Mo (1) to W (2) gave a significantly more active catalyst. (C) 2012 Elsevier B.V. All rights reserved.
publisher	ELSEVIER SCIENCE BV
issn	1566-7367
year published	2012
volume	23
beginning page	58
ending page	61
digital object identifier (doi)	10.1016/j.catcom.2012.03.006
web of science category	Chemistry, Physical
subject category	Chemistry
unique article identifier	WOS:000303975400013