Olefin isomerization by a ruthenium carbenoid complex. Cleavage of allyl and homoallyl groups
作者:Christine Cadot、Peter I Dalko、Janine Cossy
DOI:10.1016/s0040-4039(02)00141-7
日期:2002.3
Ruthenium–carbenoid catalysts such as Grubbs’ complex I mediate efficiently the isomerization of β,γ-unsaturated ethers and amines to the corresponding vinyl ethers and enamines. This reaction can be useful in the deprotection of allyl and homoallyl ethers as well as amines.
complex in combination with quinaldic acid shows high reactivity and chemoselectivity for the catalytic deprotection of hydroxyl groups protected as allyl ethers. The catalyst operates in alcoholic solvents without the need for any additional nucleophiles, satisfying the practical requirements of operational simplicity, safety, and environmental friendliness. The wide applicability of this deprotection
[CpRu(IV)(π-C3H5)(2-quinolinecarboxylato)]PF6 Complex: A Robust Catalyst for the Cleavage and Formation of Allyl Ethers
作者:Shinji Tanaka、Hajime Saburi、Masato Kitamura
DOI:10.1002/adsc.200505401
日期:2006.2
the quantitative synthesis of [CpRu(IV)(π-C3H5)(2-quinolinecarboxylato)]PF6 from [CpRu(CH3CN)3]PF6, 2-quinolinecarboxylic acid, and 2-propen-1-ol has been established. The cationic Ru(IV) complex is air- and moisture-stable, and can be stored in a vial for at least six months. This complex realizes a simple and easy operation for both the deallylation of allylethers in methanol and the dehydrative