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Carboxy betaines

Dimethyl-3-(3-amino-propyl)- 399 l,l-Dimethyl-4-carboxy- -Betain... [Pg.853]

Polymeric betaines or zwitterions are polyampholytes whose oppositely charged groups remote one from another are displaced on one pendant substituent. There are several types of monomers with a betaine structure carboxy-betaines, sulfobetaines and phosphobetaines. Poly-hT-ethyleneglycine (1), po-ly(N-3-sulfopropyl)-W-methacryloyloxyethyl-Nd -dimethylammonium betaine) (2) and poly[(2-methacryloyloxyethyl-2-(trimethylammonioethyl-phosphate)] (3) are typical examples of this kind of polyampholyte ... [Pg.175]

Colak and Tew [67] also reported the synthesis of NBE-based polycarboxy- and polysulfo betaines (Figure 7.6c) via ROMP with second-generation Grubbs ruthenium catalysts modified with 3-bromo-pyridine. Utilizing a protecting group in the synthesis allowed them to obtain poly(carboxy betaines) with very narrow polydispersities (PDI = 1.03-1.15). [Pg.158]

Kondo, M. Takano, S. Analysis of carboxy betaine amphoteric surfactants. Jpn. Kokai Tokkyo Koho JP 62006166,1987. [Pg.99]

Polyethers, alkanolamides, alkyls, alkylethoxylates, amines, benzyls, carbohydrates, esters, perfluoroalkyls Alkyl-, amidoimidazoline- and carboxy-quaternary ammonium salts Betaines, phosphobetaines, sulfobetaines... [Pg.235]

E)-(Carboxyvinyl)trimethylammonium betaine Ethenaminium, 2-carboxy-N, N, N-trimethyl-, hydroxide, inner salt, (E)- (9) (54299-83-1)... [Pg.19]

The ease of oxidation depends on the electron availability on the sulfur. In quinoline and pyrimidine analogues of (459) the rate of the reaction is decreased, and in these betaine systems sulfone formation is not observed using peracids in the oxidations. A 2-carboxy group as in (463 R = H) promotes the Pummerer-type rearrangement. The initially formed hemimercaptal mainly eliminates water to give the thiazole (464) a minor product (465) may be formed by ring opening (81H(15)1349). [Pg.701]

The colonial sea anemone Anthopleura elegantissima responds with characteristic contraction to a pheromone released by wounded conspecifics. This alarm response is highly characteristic, includes rapid bending and shortening of the tentacles and depression of the oral disk. In 1975, by extensive ion exchange column chromatography, (3-carboxy-2,3-dihydroxy-A(A(Af-trimethyl)-l-propanaminium chloride (50) was isolated as a pure crystalline substance.116 It showed alarm pheromone activity with a median concentration of 0.35 nmol 1 1 and was named anthopleurine. Comparison of spectral data between natural and synthetic compounds revealed that anthopleurine had a structure of 4-amino-4-deoxy-L-threonic acid betaine hydrochloride.117... [Pg.276]

Benzothiazol 2-Carboxy-6-methoxy- E8h, 880 (Ar- NH - CS -COOH/Oxid.) Isoquinolininm 2-Sulfo- (Betain) XI/2, 657, 662... [Pg.582]

The lower value for kx is attributed to a lower electron density on the betaine carboxy-late anion due to the inductive effect of the ammonium group. [Pg.81]

BLM one carboxy group in Fig. 4 is masked by amide and the other carboxy group forms a /3-lactam or vice versa (Fig. 4). The missing nitrogen atom was found to be present as the carboxamide of V by isolation of /3-aminoalanine betaine amide from mild add hydrolyzate of methylated BLM with methyliodide andtriethylamine. Thus, a total structure of BLM containing a /3-lactam was proposed in 1972 (Fig. S)26). A diazepine derivative, which was assumed to be formed by ring-expansion of the 0-lactam was isolated and taken as an indirect chemical proof for the presence of the 0-lactam in BLM25). [Pg.83]

Betaine or 1-carboxy-N, N, N-trimethylmethanammonium hydroxide inner salt is a relatively new and very interesting compound from a nutritional point of view. Its formula is... [Pg.147]

Betaine. l-Carboxy-N,N,N-trimetkylmetkanami-ninm hydroxide inner salt (carboxymethyl)trimethylammo-... [Pg.183]

Chloral Betaine. l-Carboxy.N,N,N-trimethyl-mlhanaminium hydroxide inner salt compd with 2,2.2-tri-chtoro-1,1 -ethunediol (1 1),- Beta -Chior Somilan. C7H,4Cl3-NO mol wt 282.57. C 29.75%, H 4.99%, Cl 37.64%, N 4.96%, O 22.65%. Prepd by warming betaine hydrate and chloral hydrate Fetrow el al, Brit. pat. 874,246 (I9S9 to British Drug Houses). [Pg.317]

Wlethanaminium, 1-carboxy-A/,/V,A/-trimethyl-, inner salt betaine ... [Pg.650]


See other pages where Carboxy betaines is mentioned: [Pg.48]    [Pg.389]    [Pg.9206]    [Pg.325]    [Pg.62]    [Pg.48]    [Pg.389]    [Pg.9206]    [Pg.325]    [Pg.62]    [Pg.76]    [Pg.125]    [Pg.121]    [Pg.76]    [Pg.125]    [Pg.126]    [Pg.703]    [Pg.283]    [Pg.668]    [Pg.588]    [Pg.76]    [Pg.125]    [Pg.126]    [Pg.537]    [Pg.181]    [Pg.199]    [Pg.937]    [Pg.583]    [Pg.220]    [Pg.703]    [Pg.14]    [Pg.185]    [Pg.575]    [Pg.304]    [Pg.166]    [Pg.158]    [Pg.179]   
See also in sourсe #XX -- [ Pg.56 ]




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