211432-64-3Relevant academic research and scientific papers
Chiral Cyclopentadienyl Ligands Enable a Rhodium(III)-Catalyzed Enantioselective Access to Hydroxychromanes and Phthalides
Ye, Baihua,Cramer, Nicolai
supporting information, p. 1490 - 1495 (2015/06/30)
The demand for efficient chiral cyclopentadienyl ligands (Cpx) has increased significantly in recent years, partly because Cp?Rh(III) species have been developed as powerful catalysts for directed C-H functionalization reactions. However, a lac
Intramolecular [2+2] photocycloaddition of bichromophoric derivatives of 3,5-dihydroxybenzoic acid and 3,5-dihydroxybenzonitrile
Hoffmann,Pete
, p. 1236 - 1242 (2007/10/03)
The irradiation of 3-alkenyloxy-5-hydroxybenzoic acid derivatives 1a-d yields highly functionalized alkyloxyenone derivatives when the reaction is carried out in the presence of acid. A higher reactivity is observed for the corresponding 3-alkenyloxy-5-hydroxybenzonitrile compounds 7a, b, which also react in neutral reaction media. In the first step of the reaction, a [2+2] photocycloaddition occurs. The following steps, leading to stable final products, need acid catalysis in the case of the substrates 1a-d. The irradiation of the benzonitrile derivative 7b also furnishes the side product 9, which results from a [2+3] photocycloaddition.
