Arene–Ruthenium Chemistry and Br?nsted Acid Catalysis of a Chiral Phosphane-Hydroxyl Ligand

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• 作者：Daniel Carmona ; M. Pilar Lamata ; Pilar Pardo ; Ricardo Rodrı ; &#769 ; guez ; Fernando J. Lahoz ; Pilar Garcı ; &#769 ; a-Ordu?a ; Ibon Alkorta ; José Elguero ; Luis A. Oro
• 刊名：Organometallics
• 出版年：2014
• 出版时间：February 10, 2014
• 年：2014
• 卷：33
• 期：3
• 页码：616-619
• 全文大小：270K
• ISSN：1520-6041

文摘

The phosphane-hydroxyl ligand (S_C1,R_C2)-Ph₂PC(Ph)HC(OH)HCH₂OMe (POH) displays 魏¹P, 魏²P,O, 魏³P,O,O鈥? and anionic deprotonated 魏³P,O,O鈥?coordination modes toward the metallic (畏⁶-p-MeC₆H₄iPr)Ru moiety. The hydroxyl group in [(畏⁶-p-MeC₆H₄iPr)Ru(魏³P,O,O鈥?POH)][SbF₆]₂ (3) has strong acidic properties. This complex catalyzes the Diels鈥揂lder reaction between cyclopentadiene and trans-尾-nitrostyrene or methacrolein as well as the Friedel鈥揅rafts reaction between indole and methyl 3,3,3,-trifluoropyruvate or trans-尾-nitrostyrene. Solution studies strongly indicate that complex 3 acts as a metallic Lewis acid assisted Br酶nsted-acid catalyst.