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A mild,efficient and simple method for the preparation of acyl azides from carboxylic acids using chlorodiphenylphosphine in the presence of molecular iodine and sodium azide is described. 相似文献
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Aromatic compounds were nitrated efficiently under essentially neutral conditions by employing Ph2PCl in the presence of I2 and AgNO3. This method minimizes waste products compared to traditional methods and gives the corresponding mononitro derivatives in good to excellent yields in dichloromethane at room temperature. 相似文献
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Ghasem Aghapour Ameneh Asgharzadeh 《Phosphorus, sulfur, and silicon and the related elements》2013,188(6):796-802
AbstractA simple, highly selective and efficient method is described for the conversion of primary alcohols, tetrahydropyranyl and silyl ethers to thiocyanates by use of chlorodiphenylphosphine and ammonium thiocyanate. Secondary substrates produce both the two isomeric products, thiocyanate and isothiocyanate, while tertiary ones give isothiocyanates as the only products by this new method. In contrast to previously reported methods based on trivalent phosphorus for this transformation, the present method does not require an electrophile in the presence of trivalent phosphorus (ClPPh2). The order of activity of these substrates is silyl ether> alcohol > tetrahydropyranyl ether. The present method not only interestingly distinguishes between primary, secondary and tertiary substrates but also converts them to the corresponding thiocyanates with excellent chemoselectivity in the presence of several other functional groups. 相似文献
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Malek Taher Maghsoodlou Norollah Hazeri Sayyed Mostafa Habibi Khorassani Reza Heydari Mahmoud Nassiri Ghasem Marandi 《Phosphorus, sulfur, and silicon and the related elements》2013,188(4):865-877
Stable crystalline phosphorus ylides were obtained in excellent yields from the 1:1:1 addition reaction between triphenylphosphine and dialkyl acetylenedicarboxylates in the presence of strong NH-acids, such as benzotriazole, 5-methylbenzotriazole, 5-chlorobenzotriazole, pyrrole, 2-acetylpyrrole, pyrrole-2-carboxaldehyde, 4-nitro-acetanilide, 4-methoxyacetanilide, 4-bromoacetanilide, 4-methylacetanilide, 2-methyl-acetanilide, and 2,6-dimethylacetanilide. These stable ylides exist in a solution as a mixture of two geometrical isomers as a result of the restricted rotation around the carbon–carbon partial double bond resulting from the conjugation of the ylide moiety with the adjacent carbonyl group. 相似文献
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Dr. Harbi Tomah Al‐Masri 《无机化学与普通化学杂志》2012,638(6):1012-1017
The reaction of 1‐naphthylamine with two equivalents of chlorodiphenylphosphine in the presence of triethylamine gave the ligand C10H7‐1‐N(PPh2)2 ( 1 ). Reaction of 1 with PdCl2(CH3CN)2 or PtCl2(cod) (1:1 molar ratio) afforded the complexes cis‐[PdCl2{C10H7‐1‐N(PPh2)2}] ( 2 ) and cis‐[PtCl2{C10H7‐1‐N(PPh2)2}] ( 3 ), respectively. Compounds 1 – 3 were identified and characterized by multinuclear NMR (1H, 13C, 31P NMR) and IR spectroscopy. Crystal structure determinations of complexes 2 and 3 were carried out. 相似文献
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Condensation of carboxylic acids with alcohols, phenols and thiols proceeded smoothly to afford carboxylic acid alkyl esters, phenolic esters and thioesters by using the combination of chlorodiphenylphosphine, imidazole and molecular iodine in refluxing acetonitrile. Esterification with this mixed reagent system gave the corresponding products in excellent yields. The phosphorus-containing byproduct was simply removed from the organic phase by basic aqueous workup without the need for chromatography purification. 相似文献
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Ghasem Aghapour Asieh Afzali 《Phosphorus, sulfur, and silicon and the related elements》2013,188(3):598-605
Abstract A new method is described for the efficient and high regioselective conversion of epoxides to symmetrical and unsymmetrical vic-dihalides in high yields using chlorodiphenylphosphine and N-halosuccinimides under solvent-free and neutral conditions and at room temperature. Supplemental materials are available for this article. Go to the publisher's online edition of Phosphorus, Sulfur, and Silicon and the Related Elements to view the free supplemental file. GRAPHICAL ABSTRACT 相似文献
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Vijaya Kabra Sunita Mitharwal Arpana Meel Suman Tanwar 《Phosphorus, sulfur, and silicon and the related elements》2013,188(12):3109-3115
Eight new cycloiminylidenamidothiophosphinates incorporating pyridine, pyrimidine, thiazole, and benzothiazole heterocycles were synthesized by phosphorylation of the quaternary iminium salts of the heterocycles by diphenylchlorophosphine followed by in situ sulfurization by elemental sulfur. Crystalline solid products were well characterized by elemental analysis and NMR spectroscopy. 相似文献
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Malek Nechab Michel Troupel Jean-Yves Nédélec 《Journal of organometallic chemistry》2006,691(9):1809-1813
A two-steps procedure allowing the formation of alkyldiphenylphosphines and aryldiphenylphosphines in good yield is described. It relies on the electrochemical preparation of magnesium chloride diphenylphosphanide and its subsequent coupling with either alkyl halides or aryl fluorides. 相似文献
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含膦,氮配体的混合膦酸锆—钯催化剂的研制 总被引:6,自引:3,他引:6
用氯化二苯基膦为膦化试剂,首次对多乙烯多胺乙基膦酸-磷酸氢锆Zr(HPO4)1.35(O2PCH2CH2(NHCH2CH2)mNH2)0.65·H2O(ZP-PEPAEPA,n=0,1,2,3,4)载体表面进行二苯基膦化,合成了一类含膦氮配体的新型混合膦酸锆载体及负载钯催化剂。研究了有机膦酸侧链不同链长和Ph2PCl用量对配体载体制备的影响,并用IR,TG,DTG,DTA对这类载体及催化剂进行表征 相似文献
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