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Synthesis of MCM-41-supported Bidentate Nitrogen Palladium(Ⅱ) and Bidentate Phosphine Rhodirm(Ⅲ) Complixes and Their Applications in Organic Synthesis

Author: PengJian
Tutor: CaiMingZhong
School: Jiangxi Normal University
Course: Organic Chemistry
Keywords: MCM-41 Supported catalysts Bidentate nitrogen palladium complexes Bidentate phosphine rhodium complexes Carbonyl allylation Suzuki coupling Diphenyl Hydroformylation Suzuki Coupling Diaryl ketone
CLC: O621.2
Type: Master's thesis
Year: 2010
Downloads: 24
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Abstract


This paper consists of two parts: 1. By reacting 3 - (2 - aminoethylamino) propyl trimethoxy silane and MCM -41 condensation Immobilized trimethylchlorosilane silicide prepared double - nitrogen functionalized MCM -41 mesoporous materials (MCM-41-2N). The latter again with palladium chloride , Pd (OAc ) 2 reaction , the first synthesis of MCM-41 as bidentate nitrogen palladium ( II ) complexes (MCM-41-2N-Pd (Ⅱ)), and by XRD , XPS characterized its structure and elemental analysis . Study found that preparation of MCM - 41 load nitrogen bidentate palladium ( II ) complexes (MCM-41-2N-PdCl2) can efficiently catalyze aldehyde allylation reaction of the ketone carbonyl group and a carbonyl group of the Suzuki coupling reaction . Meanwhile, the preparation of MCM-41 as the nitrogen bidentate palladium ( II ) complexes (MCM - 41 -2N -Pd ( OAc) 2 ) Suzuki reaction of aryl halides with aryl boronic acid having a very high activity , for the synthesis of the biphenyl compounds provide a new way to a green . By recovery experiments found that the supported bidentate nitrogen complexes of palladium ( II ) catalyst has good recycling performance . Starting from the industrial readily available γ-aminopropyl triethoxysilane , immobilized by condensation with MCM-41 , the amino function of the MCM-41 mesoporous materials (MCM-41-NH2), which is prepared bisphosphonic functionalized MCM-41 mesoporous materials ( MCM - 41- 2P ) with the diphenylphosphino methanol condensation . MCM-41-2P reacts with RhCl3 to the synthesis of a new type of MCM-41 as the bidentate phosphine rhodium ( III ) complexes (MCM-41-2P-Rh (Ⅲ)), XRD, XPS and elemental analysis . its structure was characterized . The study found that the preparation of MCM - 41 load dual the monodentate phosphine rhodium ( III ) complexes can be effective catalytic alkyne and diphenylphosphine oxide phosphonic hydrogenation reaction , the reaction having a very high stereo-and regioselectivity , as ( E ) the synthesis - alkenyl phosphine acylation provide green new ways . Several recovery experiments show that the load catalyst has excellent for recycling .

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CLC: > Mathematical sciences and chemical > Chemistry > Organic Chemistry > Organic Chemistry general issues > Properties of organic compounds
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