Synthesis and Reactivity of Fluorous and Nonfluorous Aryl and Alkyl Iodine(III) Dichlorides: New Chlorinating Reagents that are Easily Recycled using Biphasic Protocols
作者:Ajda Podgoršek、Markus Jurisch、Stojan Stavber、Marko Zupan、Jernej Iskra、John A. Gladysz
DOI:10.1021/jo900233h
日期:2009.4.17
NaHCO3 liquid/liquid biphase workups. The coproduct from the latter, 4,4′-IC6H4C6H4I, is insoluble in common organic solvents, allowing separation by liquid/solid phase workups (91−89% recoveries). The effect of the structure of the iodine(III) dichloride upon reactivity is analyzed in detail. The fluorous systems with Rf8 substituents are generally superior, but 16 is more reactive and gives higher selectivities
式(R fn(CH 2)3)2 C 6 H 3 ICl 2的氟代芳基和烷基碘(III)二氯化物(R fn = CF 3(CF 2)n-1;对于3,5- n = 8二取代的和ñ = 6,8,10为2,4-二取代的)和R FN CH 2 ICl的2(ñ = 8,10)以71-98%的产率经Cl的反应制备2和相应的氟碘化物。这些是将环辛烯转化为反式的有效试剂-1,2-二氯环辛烯,茴香醚到4-氯和2-氯茴香醚,4-叔丁基苯酚到2-氯-4-叔丁基苯酚,PhCOCH 2 COPh到PhCOCHClCOPh,PhCOCH 3到PhCOCH 2 Cl和PhCOCHCl 2(CH 3 CN,室温至40°C,100-64%转化率)。氯化产物和氟碘化物副产物很容易通过有机/氟液/液双相后处理分离。后者以97-90%的产率获得,并用Cl 2再氧化。用3-Cl 2 IC 6 H 4 COOH(16)和4,4'-Cl
Catalytic, oxidant-free, direct olefination of alcohols using Wittig reagents
作者:E. Khaskin、D. Milstein
DOI:10.1039/c5cc02902c
日期:——
Catalytic acceptorless coupling of alcohols with in situ generated phosphonium ylides forms olefins and H2, with significant stereospecificity.
醇与原位生成的磷鎓叶立德的催化无受体偶联形成具有显着立体特异性的烯烃和H 2。
A new type of water insoluble surfactant: molecular aggregation of long chain phosphonium salts (Ph<sub>3</sub>P<sup>+</sup>–CH<sub>2</sub>CH<sub>2</sub>R,I<sup>–</sup>; R = alkyl or fluoroalkyl) in formamide
作者:B. Escoula、N. Hajjaji、I. Rico、A. Lattes
DOI:10.1039/c39840001233
日期:——
The molecular aggregations of various water insoluble substituted phosphonium salts (Ph3P+–CH2CH2R,I–; R = C4H9, C6H13, C8H17, C4F9, C6F13, OR C8F17) are compared and the results show that the salts have surfactant properties.
各种水不溶性的取代鏻盐的分子聚集(PH 3 P + -CH 2 CH 2 R,I - ; R = C 4 H ^ 9,C 6 H ^ 13,C 8 H ^ 17,C 4 ˚F 9,C 6 ˚F比较13,或OR C 8 F 17),结果表明该盐具有表面活性剂性质。
Strategy and design in fluorous phase immobilization:�a systematic study of the effect of ?pony tails? (CH2)3(CF2)n?1CF3 on the partition coefficients of �benzenoid compounds
作者:Christian Rocaboy、Drew Rutherford、Byron L. Bennett、J. A. Gladysz
Fluoroussolvents commonly exhibit temperature-dependent miscibilities with organic solvents. Thus, catalysts and reagents that have high affinities for fluoroussolvents can be used in protocols that combine the advantages of one-phase chemistry (higher temperature) and biphase product separation (lower temperature). The high-yield conversion of benzaldehydes (via Wittig and hydrogenation reactions)
Diphosphonium bistriflimides were obtained from bis(diphenylphosphano)alkanes, Ph2P(CH2)nPPh2 with n = 2–5. As alkylating reagents, n-C6F13CH2CH2OTf and n-C6F13CH2CH2I were applied. Ammonium and phosphoniumionicliquids with perfluorinated side chains were prepared as hybrid materials for surface impregnation. Melting points of the triflimide salts range up to 95 °C. The key feature of this investigation