ライフサイエンスコーパス: superacid

1 stitute for nonoxidizing strong protic acids/superacids.

2 he conjugate bases of known strong acids and superacids.

3 CH horizontal lineC(X)CF3, X = F, Cl, Br] in superacids.

4 orm highly electrophilic systems in Bronsted superacids.

5 salts, as well as protosolvation of NO2+ by superacids.

6 The mode of generation of Lewis superacids 6A and 6B allows an approximate comparison (o

7 observed, in triflatoboric acid, a powerful superacid, alkylation takes place, indicating protolytic

8 ts of two key players, a silicon-based Lewis superacid and a nucleophilic gold acetylide.

9 acationic electrophile has been generated in superacid and shown to undergo an arylation reaction wit

10 -short SWNTs (US-SWNTs) in organic solvents, superacid and water is about 2 wt %.

11 mes the major limitations of presently known superacids and has potentially wide application.

12 The chemistry is most efficient in excess superacid, and it has been accomplished with aryl and al

13 notubes form true thermodynamic solutions in superacids, and report the full phase diagram, allowing

14 f triaryl methanols were ionized in Bronsted superacids, and the corresponding tricationic intermedia

15 tent image is captured when small amounts of superacid are generated by the photolysis of iodonium sa

16 ion, (CH3)3O+ with excess of 1:1 (2)HF/SbF5 superacid at -30 degreesC over a period of 30 days showe

17 The pioneering discovery of the use of superacids by George A. Olah, in the early 1960s, to cha

18 ew method for the generation of chiral Lewis superacids by protonation of a non-Lewis acidic oxazabor

19 This paper describes the superacid-catalyzed chemistry of olefinic amines and rel

20 In superacid-catalyzed reactions with arenes, two competing

21 ted heterocycles are reacted in the Bronsted superacid CF(3)SO(3)H (triflic acid), and products are o

22 tituted superelectrophiles were generated in superacid (CF(3)SO(3)H), and their chemistry was examine

23 zene in good yields (74-96%) in the Bronsted superacid, CF(3)SO(3)H (triflic acid).

24 In synthetic studies, the Bronsted superacid CF3SO3H is found to be an effective acid catal

25 ated 1,5-diarylpent-2-en-4-yn-1-ones add the superacid CF3SO3H to the acetylenic bond with formation

26 hydes and ketone with arenes in the Bronsted superacid CF3SO3H.

27 Phenanthrene is nearly inert to the same superacid conditions.

28 Superacids, defined as acids with a Hammett acidity func

29 s CO2 while traditional mixed Lewis/Bronsted superacids do not.

30 ne, and hexamethylbenzene with the carborane superacid H(CB(11)HR(5)X(6)) (R = H, Me; X = Cl, Br).

31 es of protonation studies using the Bronsted superacid H(CHB(11)Cl(11)) both in the solid state and i

32 The carborane superacid H(CHB11 F11 ) is that acid.

33 A new superacid, H(CB11H6X6) (where X = chlorine or bromine),

34 and fluorinated arylamines was performed in superacid HF/SbF5 through a superelectrophilic ammonium-

35 dimethyl nitramine with anhydrous HF and the superacids HF/MF5 (M=As, Sb) were investigated at temper

36 erated by the reaction of CO with the liquid superacid hydrofluoric acid-antimony pentafluoride (HF-S

37 red the applications of this newly available superacid in catalysis.

38 r structures and properties, for example, in superacids, in salts, or in the gas phase.

39 At low SWNT concentration (below 200 ppm) in superacids, light absorbance in the range from 400 to 14

40 ated at the cyano groups (1H2 2+) in various superacid media.

41 reactivity of electrophilic intermediates in superacid media.

42 diprotonated dications in CF(3)SO(3)H-SbF(5) superacid medium.

43 t are typical of common, difficult-to-handle superacid mixtures?

44 infrared spectra are difficult to obtain in superacids or salts (where furthermore the cations may b

45 The H(CB11H6X6) superacid overcomes the major limitations of presently k

46 In this Note, we describe superacid-promoted cyclodehydrations leading to function

47 The superacid-promoted reactions of alpha-hydroxy and alpha-

48 The superacid-promoted reactions of vinyl-substituted N-hete

49 ion H0 </= -14.5 and is thus identified as a superacid, providing the first evidence for superacidity

50 renium ionic liquids are the strongest Lewis superacids reported to date, with the acidity enhanced b

51 ons, an equilibrium involving the 1 and 2 in superacid solutions is most likely responsible for the e

52 Quenching of the superacid solutions of the dications resulted in the for

53 ined in a 3:2 or 3:1 ratio, depending on the superacid system.

54 of chloroethane by the strongest known solid superacid, the carborane acid H(CHB(11)Cl(11)), has been

55 Compound 2 undergoes ring opening in the superacid to give the ipso-monoprotonated 2H+, which on

56 The failure of traditional mixed superacids to protonate weak bases such as CO2 can be tr

57 The superacid trifluoromethanesulfonic acid (TfOH), 1 M in d

58 We show here that the superacid trifluoromethanesulfonic acid (TfOH), ca. 1 M

59 ution-based chemical treatment by an organic superacid, which uniformly enhances the photoluminescenc

60 Reaction of this superacid with C60 gives HC60+ as a stable ion in soluti