Triphenylphosphine oxide supported on non-cross-linked maleimide–styrene copolymer: application as a novel Hendrickson reagent
摘要:
A new triphenylphosphine oxide reagent linked to a linear maleimide-styrene copolymer is synthesized. This phosphine-bound copolymer is converted to copolymer-supported triphenylphosphine ditriflate as a novel Hendrickson reagent by treatment with triflic anhydride. This reacts rapidly in various dehydration reactions such as anhydride, ester and amide formation. This linear and soluble support is also easily recovered and recycled several times without loss of efficiency. (C) 2008 Elsevier Ltd. All rights reserved.
We present a novel and highly efficient methodology that allows for the construction of C–P bonds via the palladium-catalyzed air-based oxidative coupling of various commercially available arylboronicacids with easily oxidized H-phosphine oxides leading to valuable aryl phosphine oxides, particularly triarylphosphine oxides, with the use of air as the green oxidant, broad substrate applicability and
A new method for copper-catalyzed P-C bond formation through reaction of phosphorus nucleophiles with diaryliodonium salts at room temperature is described. Most target products are obtained with this method in high yields within a short reaction time of 10 min. It can be easily adapted to large-scale preparations. When unsymmetrical iodonium salts are employed, nucleophilic substitution occurs preferentially on the sterically hindered aromatic ring or the more electron-deficient ring.
PAVLOV G. P.; KUXTIN V. A.; GOLYNINA N. A.; KORMACHEV V. V., ZH. OBSHCH. XIMII, 1980, 50, HO 8, 1902-1903
作者:PAVLOV G. P.、 KUXTIN V. A.、 GOLYNINA N. A.、 KORMACHEV V. V.