منابع مشابه
Hypervalent iodine mediated oxidative amination of allenes.
An oxidative amination of allenes using a single hypervalent iodine reagent is reported. The reaction proceeds very efficiently for monosubstituted allenes and leads to formation of the corresponding propargylic amines, either as the internal or as the terminal amine. The respective reaction outcome could be influenced in favor of the former product by addition of triphenylphosphine oxide to th...
متن کاملCatalytic C-H bond addition of pyridines to allenes by a rare-Earth catalyst.
The catalytic C-H addition of pyridines to allenes has been achieved for the first time by using a half-sandwich scandium catalyst, thus constituting a straightforward and atom-economical route for the synthesis of alkenylated pyridine derivatives. The reaction proceeded regio- and stereoselectively, affording a new family of alkenylated pyridine compounds which are otherwise difficult to synth...
متن کاملIsocyanate asthma: respiratory symptoms due to 1,5-naphthylene di-isocyanate.
Occupationally related asthma developing in three patients due specifically to exposure to 1,5-naphthylene di-isocyanate (NDI), a hot curing agent used in manufacturing rubber, has been confirmed for the first time using bronchial provocation testing. This substance has been thought to be safer than toluene di-isocyanate (TDI) and diphenylmethane di-isocyanate (MDI) because of its relatively hi...
متن کاملAsymmetric carbon-carbon bond formation gamma to a carbonyl group: phosphine-catalyzed addition of nitromethane to allenes.
A chiral phosphine catalyzes the addition of a carbon nucleophile to the gamma position of an electron-poor allene (amide-, ester-, or phosphonate-substituted), in preference to isomerization to a 1,3-diene, in good ee and yield. This strategy provides an attractive method for the catalytic asymmetric gamma functionalization of carbonyl (and related) compounds.
متن کاملPalladium-catalyzed highly regio- and stereoselective addition of organoboronic acids to allenes in the presence of AcOH.
The Pd(0)-catalyzed regio- and stereoselective addition of organoboronic acids to allenes leads to stereodefined tri- or tetrasubstituted alkenes. Furthermore, this method shows high substitutent-loading capability and tolerance of various substitutents. A hydropalladation-Suzuki coupling mechanism, which may account for the regio- and stereoselectivity, is proposed.
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: Acta Chemica Scandinavica
سال: 1973
ISSN: 0904-213X
DOI: 10.3891/acta.chem.scand.27-3368