New Preparation of Benzylic Aluminum and Zinc Organometallics by Direct Insertion of Aluminum Powder
作者:Tobias D. Blümke、Klaus Groll、Konstantin Karaghiosoff、Paul Knochel
DOI:10.1021/ol202733v
日期:2011.12.16
benzylic aluminum sesquichlorides under mild conditions (THF, 20 °C, 3–24 h) without homocoupling (<5%). These new benzylic organometallics reacted smoothly with various electrophiles (Pd-catalyzed cross-couplings, or Cu-mediated acylations, allylations, or 1,4-addition reactions). Electron-poor benzylic chlorides or substrates prone to Wurtz coupling can be converted to benzylic zinccompounds by the
describes an environmentally friendly strategy for thiolation and trifluoromethylthiolation of Hantzsch esters. The alkyl radical could be generated smoothly without any photocatalyst via modification of chromophores of alkyl dihydropyridines and wavelength of light. Besides, a broad alkyl dihydropyridine substrate scope and high functional group tolerance are observed. In addition, the modulation of