Butanesulfonic acid

Hydroxy- 1-butanesulfonic acid sultone has been made through the chlorosulfonation of 1-chlorobutane,3 from 4-chlorobutyl acetate 2 4 which is prepared through the reaction of tetrahydrofuran and acetyl chloride,2 from 4-chlorobutanol,4 and from bis-4-chlorobutyl ether.2 Both 4-chlorobutanol and bis-4-chlorobutyl ether can be prepared from tetrahydrofuran.6... 

CAPS = 3-(cyclohexylamino)-1-propanesulfonic acid CABS =4-(cyclohexylamino)-l-butanesulfonic acid MES = 2-(N-morpholi-no)ethanesulfonic acid MOPS = 3-(N-morpholino)propanesul-fonic acid. 

A/ -trimetyl-A/-butanesulfonic acid ammonium TMBSA C7H18NO3S 196.29... 

A -trimetyl-A-butanesulfonic acid ammonium hydrogen sulfate... 

Chlorobutane gives 1- and 4-chloro-2-butanesulfonyl chloride and 4-chloro-l-butanesulfonyl chloride,204 hydrolysis of which affords the corresponding sulfonic acids 4-chloro-2- and -1-butanesulfonic acid lose hydrogen chloride when heated, passing into sultones205 (internal anhydrides of hydroxy sulfonic acids). 

Mobile phase MeOH buffer 20 80 (Buffer was 15 mM 1-butanesulfonic acid + 15 mM KH2PO4 + 2 mL/L triethylamine, pH adjusted to 4.8 0.1 with dilute phosphoric acid.) Column temperature 50 Flowrate 2 Ipjection volume 20 Detector UV 214... 

Pyiidinium)butanesulfonic acid tosylate, also is a good catalyst for these reactions [232], Ionic hquids have also been used in conjunction with solid silica supports. A combination of silica-bound sulfonic acid and the ionic liquid 1-butyl-3-decylimidazolium SbFs gave good yields with a variety of enones, including methyl vinyl ketone [233]. Another successful catalyst used a silica-bound imida-zolium-butanesulfonic acid [234]. Chiral D-camphorsulfonic acid used in conjunction with 1 -butyl-3-methylimidazolium bromide (bmim Br) gave excellent yields with 1,3-diarylpropen(Mies, but the ee was in the 20-30% range in most cases [235]. 

Electrochemical homopolymerization of poly(aniline-N-alkylsulfonates) (alkyl = propyl, butyl and pentyl) in acetonitrile containing 0.1 M NaC104 and 5 % (v/v) 0.3 M HCIO4 was carried out by Rhee et al. [144]. The polymers were prepared on a platinum electrode by cyclic voltammetry (0.0 to 1.0 V vs Ag/AgCl) or potentiostatic techniques (1.0 V). These polymers were found to form liquid crystalline solutions in water. The conductivity of poly(aniline-N-propanesulfonic acid) and poly(aniline-N-butanesulfonic acid) was reportly 9 x 10 and 6 x 10 S/cm, respectively. Electrochemical polymerization of orthanilic acid, metanilic acid and sulfonic acid and their copolymerization with aniline in dimethyl sulfoxide containing tetrabutyl ammonium perchlorate were carried out by Sahin et al. [145]. These polymers and copolymers were found to be soluble in water, dimethyl sulfoxide and N-methylpyrrolidinone. The conductivity of orthanilic acid, metanilic acid and sulfonic acid was reportly 0.052,0.087 and 0.009 S/cm, respectively. The conductivity of copolymers for these three isomers of aminobenzene-sulfonic acid was reported as 0.094, 0.26 and 0.033 S/cm, respectively. Sahin et al. [146] have also prepared the copolymers of these three isomers with aniline in acetonitrile containing fluorosulfonic acid (FSO3H). The copolymers were found to be soluble in water, dimethyl sulfoxide and N-methylpyrrolidinone. 

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