We found a match
Your institution may have rights to this item. Sign in to continue.
- Title
Visible Light‐Gated Organocatalysis Using a Ru<sup>II</sup>‐Photocage.
- Authors
González‐Delgado, José A.; Romero, Miguel A.; Boscá, Francisco; Arteaga, Jesús F.; Pischel, Uwe
- Abstract
The light‐gated organocatalysis via the release of 4‐N,N‐dimethylaminopyridine (DMAP) by irradiation of the [Ru(bpy)2(DMAP)2]2+ complex with visible light was investigated. As model reaction the acetylation of benzyl alcohols with acetic anhydride was chosen. The pre‐catalyst releases one DMAP molecule on irradiation at wavelengths longer than 455 nm. The photochemical process was characterized by steady‐state irradiation and ultrafast transient absorption spectroscopy. The latter enabled the observation of the 3MLCT state and the spectral features of the penta‐coordinated intermediate [Ru(bpy)2(DMAP)]2+. The released DMAP catalyzes the acetylation of a wide range of benzyl alcohols with chemical yields of up to 99 %. Control experiments revealed unequivocally that it is the released DMAP which takes the role of the catalyst.
- Subjects
ORGANOCATALYSIS; BENZYL alcohol; CHEMICAL yield; ACETIC anhydride; VISIBLE spectra; PENTAQUARK
- Publication
Chemistry - A European Journal, 2020, Vol 26, Issue 62, p14229
- ISSN
0947-6539
- Publication type
Article
- DOI
10.1002/chem.202001893