Piperidinium bromide

Mepenzolate Mepenzolate, 3-[(hydroxydiphenylacetyl)oxy]-l,1-dimethyl piperidinium bromide (14.1.13), is synthesized by esterification of benzilic acid with l-methyl-3-chloropiperidine and subsequent reaction of the resulting ester (14.1.12) with methyl bromide [14,15]. 

Aus N-(2-Brom-2-methyl-propyliden)-morpholinium- bzw. -piperidinium-bromid erhalt man mit tert.-Butylamin dagegen unter Umlagerung tert.-Butyl- (2-methyl-2-morpholino-propyliden)- bzw. -(2-methyl-2-piperidino-propyliden)-amin (45 bzw. 40%). ... 

A mixture of l-benzyl-4-(4-phenyl)-4-(acetaminomethyl)piperidine, 3-(4-fluorobenzoyl)propyl bromide, sodium bicarbonate and anhydrous acetone was stirred and heated under reflux. The resulting mixture was filtered while still hot, and the filtrate was concentrated to dryness under reduced pressure. The residue was washed with ether to give l-benzyl-l-[3-(4-fiuorobenzoyl)propyl]-(4-phenyl-4-acetaminomethyl)piperidinium bromide. 

To a stirred mixture of thiophenol and 15% (W/W) aqueous sodium hydroxide was added the l-benzyl-l-[3-(4-fluorobenzoyl)propyl]-(4-phenyl-4-acetaminomethyl)piperidinium bromide and the mixture was heated to 85°-90°C for 2 h. After cooling, solid matter precipitated was collected by filtration and washed with water to give l-[3-(4-fluorobenzoyl)propyl]-4-(acetaminomethyl)-4-phenylpiperidine, melting point 111°-112°C. 

N-Methoxymethyl-N-methyl piperidinium bromide [73] [PhCH2NMe2(CH2)6NMe2CH2Php+2Br- [53, 60]... 

PIPERIDINIUM, 1-ETHYL-1 - (2-HYDROXYETHYL) -, BROMIDE, BENZILATE (ester) PIPERONAL. DIBENZYLMERCAPTAL PLATINUM (II), DIAMMINEDICHLORO-, cis-POLYDIMETHYL SILOXANE... 

Apart from the omnipresent imidazolium based ionic liquids, other classes of low melting salts have been successfully applied in carbon-carbon coupling reactions, notably tetraalkyl ammonium and phosphonium salts. The former include pyrrolidinium and piperidinium salts, but particularly tetrabutylammonium bromide, [(C4)4N]Br (mp. 103-105°C), which has been evaluated quite extensively in Heck reactions and a remarkable increase in reactions rates is frequently observed with this solvent. Those examples where [(C4)4N]Br acts merely as co-catalyst[2"61 rather than as reaction medium shall not be discussed here. 

Ammoninm (Piperidino-methyl)-trimethyl- -bromid E16a, 1008 (N-Aminomethylier.) Formamidinium N,N -Dimethyl-N,N -dipropyl-(iodid) E5, 94 (N-Alkylier.) N,N,N, N -Tetraethyl- (methylsulfat) E5, 90 (OR - NR2) Piperidinium l-(Dimethylamino-methyl)-l-methyl- -bromid E16a, 1008 (N-Aminomethylier.)... 

Chemical Name l-(3-Hydroxy-5-methyl- i-phenyIhexy 1 )-I-methylpiperi-dinium bromide CAS Num 520-20-7 Common Name DarsCine Common Name Mepiperphenidol Chemical Type Piperidinium halide Tox Num B027... 

Piperidinium selenocarboxylates (15 equation 10) have been isolated in high yields from the reaction between diacyl diselenides and piperidine. The salts (15) dissolved in common protic and aprotic solvents and readily reacted with alkylating agents such as phenacyl bromide to give the corresponding esters in almost quantitative yields. ... 

The same group reported indium-mediated tandem radical addition-cyclization-trap reactions in aqueous media [52c], The use of water-soluble radical initiator 2,2 -azobis[2-(2-imidazolin-2-yl)propane], water-soluble chain carrier 1-ethyl-piperidinium hypophosphite (EPHP) and surfactant cetylammonium bromide (CTAB) allowed the C-C bond-forming radical reactions of highly hydrophobic substrates in water [53], Similarly, the use of CTAB and EPHP in presence of 4,4 -azobis(4-cyanovaleric acid) promoted the indium-mediated radical addition to P-substituted conjugated alkenes in water [54]. 

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