Selective transformation of nitriles into amides and carboxylic acids by an immobilized nitrilase
作者:Norbert Klempier、Anna de Raadt、Kurt Faber、Herfried Griengl
DOI:10.1016/s0040-4039(00)92623-6
日期:1991.1
Using an immobilized nitrilase from Rhodococcus sp. mild and selective hydrolysis of nitriles can be achieved even in the presence of acid or base sensitive groups under neutral conditions. This method is applicable to a broad range of substrates as exemplified by aliphatic, alicyclic, heterocyclic and carbohydrate type nitriles.
alkyl substrates were efficiently converted in combination with different type of amines and vicinal diols into various substituted pyrroles in reasonable to excellent isolated yields. Additionally, α-functionalized ketones gave synthetically interesting amido-, alkoxy-, aryloxy-, and phosphate-substituted pyrroles in a straightforward manner. The synthetic protocol proceeds in the presence of a commercially
Deoxygenative Transformation of Alcohols via Phosphoranyl Radical from Exogenous Radical Addition
作者:Wenhao Xu、Chao Fan、Xile Hu、Tao XU
DOI:10.1002/anie.202401575
日期:2024.4.22
A general approach to the direct deoxygenative transformation of primary, secondary, and tertiary alcohols has been developed. It proceeds through phosphoranyl radical intermediates generated by the addition of exogenous iodine radical to trivalent alkoxylphosphanes. Since these alkoxylphosphanes are readily in situ obtained from alcohols and commercially available, inexpensive chlorodiphenylphosphine
Selective Ruthenium-Catalyzed Three-Component Synthesis of Pyrroles
作者:Min Zhang、Helfried Neumann、Matthias Beller
DOI:10.1002/anie.201206082
日期:2013.1.7
It's a snap: a novel catalytic three-component coupling reaction using simple and easily available substrates leads to a wide range of substituted pyrroles with high regioselectively (Xantphos=9,9-dimethyl-4,5-bis(diphenylphosphino)xanthene).
Raadt, Anna de; Klempier, Norbert; Faber, Kurt, Journal of the Chemical Society. Perkin transactions I, 1992, # 1, p. 137 - 140
作者:Raadt, Anna de、Klempier, Norbert、Faber, Kurt、Griengl, Herfried