1- Ethyl-2-sulfo

Two methods which reduce or avoid 0-alkylation and employ heterogeneous reaction conditions include (i) the heating of crystalline thallium(I) enolates of B-keto esters or B-diketones with primary or secondary alkyl iodides and (ii) the heating of stabilized sodium enolates with methyl- or ethyl-sulfo-nium salts.2 However, the reproducibility and generality of the former method has been questioned. ... 

Methyl and Ethyl, 504 9-Fluorenylmethyl, 506 9-(2-Sulfo)fluorenylmethyl, 507 9-(2,7-Dibromo)fluorenylmethyl, 507 17-Tetrabenzo[a,c,gf,/]fluorenylmethyl, 508 2-Chloro-3-indenylmethyl, 508 Benz[f]inden-3-ylmethyl, 508... 

The ability to disperse the calcium soap formed from a given amount of sodium oleate has been studied for a number of a-sulfo fatty acid esters with 14-22 carbon atoms [28,30]. In principle, the lime soap dispersion property increases with the number of C atoms and the dissymmetry of the molecule. Esters with 14 C atoms have no dispersion power and in the case of esters with 15-17 carbon atoms the least symmetrical are the better lime soap-dispersing agents. However this property does not only depend on the symmetry but on the chain length of the fatty acid group. For example, methyl and ethyl a-sulfomyristate have better dispersing power than dodecyl propionate and butyrate. The esters with 18 and more carbon atoms are about equal in lime soap dispersion power. Isobutyl a-sulfopalmitate is the most effective agent under the test conditions. 

A liquid detergent for dishes, vegetables, and fruit comprises the sodium salt of a-sulfo coconut acid ethyl ester (20%), an alkylamine oxide (5%), citric acid (0.5%), ethanol (50%), and water [78]. 

Sulfosuccinimidyl-2-(7-azido-4-methylcoumarin-3-acetamide)ethyl-l,3 -dithiopropionate (SAED) is a photoreactive heterobifunctional crosslinking agent that also contains a fluorescent group (Thermo Fisher). The sulfo-NHS ester end of the reagent reacts with primary amines in proteins and other molecules to form stable amide linkages. The photoreactive end is an AMCA... 

Sulfo-NHS-SS-Biotin SuIfosuccinimidyl-2-(biotinamido)-ethyl-1,3-dithiopropionate MW 606.7 24.3 A... 

Bis[2-(Sulfosuccinimido-oxycarb onyl- oxy) ethyl] sulfone (Sulfo-BSOCOES) X Yes Yes 1.30... 

Neben Oxiranen oder 2-Oxo-l,3-dioxolan werden zur N-Alkylierung von Imidazolen manch-mal auch andere Heterocyclen verwendet, die in der Lage sind, unter Ringoffnung Nukleophile zu addieren. So kann 2-Methyl-4(5)-nitro-imidazol mit l,2-Oxathiolan-2,2,-dioxid (Propansul-ton) zu 2-Methyl-5-nitro-l-(3-sulfo-propyl)-imidazol (48%) und mit 2-Oxo-oxetan zu l-(2-Carboxy-ethyl)-2-methyl-4-nitro-imidazol umgesetzt werden875. 

N N=N-0 C00H r- u [Pg.16]

Sulfosuccinimidyl-2-(w-azido-o-nitrobenzamido)-ethyl-l,3 -dithiopropionate (SAND) is a heterobifunctional reagent containing an amine-reactive sulfo-NHS ester at one end and a photoreactive phenylazide group on the other (Pierce). The presence of the sulfonate group on the NHS ring lends water solubility to the reagent due to its... 

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