An efficient and general synthesis of 3-substituted propionaldehydes using the Suzuki–Miyaura coupling
作者:Cameron J Cowden、Deborah C Hammond、Brian C Bishop、Karel M.J Brands、Antony J Davies、Ulf-H Dolling、Sarah E Brewer
DOI:10.1016/j.tetlet.2004.06.053
日期:2004.8
An efficientmethod to prepare 3-substituted propionaldehyde derivatives using a Suzuki–Miyauracoupling is reported. The reaction has been demonstrated on a range of substrates including several where the Heck reaction with allyl alcohol failed to give the desired aldehyde product.
The photocatalyzed [2 + 2 + 2]-cycloaddition of nitriles with 2 equiv of acetylene to 2-pyridines can be carried out under mild conditions and represents a valuable extension to common synthetical methods. For the ideal wavelength range (350-500 nm), lamps as well as sunlight can be used. Working at room temperature and in organic solvents such as toluene or hexane as well as in water gives satisfying results in many cases. However, it is also possible to vary the solvent and the reaction temperature of the photocatalyzed synthesis and to choose, with respect to the specific substrate, specific requirements for this particular reaction and general requirements of the method. This simple and selective method derives its potential mainly from the large variety of applicable nitriles. Suitable substrates include (functionalized) aliphatic and aromatic nitriles as well as cyanamides derived from secondary amines.
Fleming, Steven A.; Bachelder, Vance D., Journal of Heterocyclic Chemistry, 1991, vol. 28, # 8, p. 2061 - 2063
作者:Fleming, Steven A.、Bachelder, Vance D.
DOI:——
日期:——
725. The reaction of organolithium compounds with some halogeno-acetals