6-Vinyl-2-picoline

A novel approach to estrone via D-homoestrone by S. Danishefsky and A.Nagel [Chem. Commun., 373 (1972)] is based on a novel bisannelation sequence in vrhich the 6-vinyl-2-picoline moiety serves as a masked equivalent of two moles of methyl vinyl ketone (Mi)[S. Danishefsky and R. Cavanaugh, J. Amer. Chem. Soc., 90, 520 (1968)J. 

In initial studies toward (+ )-estrone, vinyl picoline 41 was condensed with hydrindenone 16 in analogy with the reaction of 41 with 42. However, since... 

Chloromethylbenzo-l,2,4-thiadiazine 1,1-dioxide forms quaternary salts, e.g. 8 (n = 1), with pyridine, 2- and 3-picolines, and iso-quinoljne, but the 3-(2 -chloroethyl) compound gives a lower yield of the salt, e.g. 8 (% = 2), because some of the halogen derivative is converted into the 3-vinyl compound. ... 

Diphenyl carbonate from dimethyl carbonate and phenol Dibutyl phthalate from butanol and phthalic acid Ethyl acetate from ethanol and butyl acetate Recovery of acetic acid and methanol from methyl acetate by-product of vinyl acetate production Nylon 6,6 prepolymer from adipic acid and hexamethylenediamine MTBE from isobutene and methanol TAME from pentenes and methanol Separation of close boiling 3- and 4-picoline by complexation with organic acids Separation of close-boiling meta and para xylenes by formation of tert-butyl meta-xyxlene Cumene from propylene and benzene General process for the alkylation of aromatics with olefins Production of specific higher and lower alkenes from butenes... 

Mn(02CCF3)2 wL (where L = pyandw = 2or4 L = pyridine-A-oxide and n = 1 or L = y-picoline and n = 1, 2, or 4) (7) have been characterized. Compound Mn(acao)2(02CCF3) aids the polymerization of methylmethacrylate and vinyl acetate and is reduced to Mn(acac)-(OgCCFg) in these processes (187, 188). 

A significant outlet for a-picoline is the production of 2-chloro-6-(trichloro-methyl)pyridine, which is used as a nitrification inhibitor in agricultural chemistry and in the manufacture of the defoliant 4-amino-2,5,6-trichloropicolinic acid. However, the major commercial outlet for a-picoline is still its use as a starting material for the two-step production of 2-vinylpyridine. The total yield of 2-vinyl-pyridine formed via eq. (7) can be as high as 90 %. 

Nonanoic acid vinyl pyridine source a-Picoline vinyl resin modifier Dioctyl maleate vinylidene chloride mfg. 

The reactions of substituted vinylpyiidines have not been intensively studied. -Methylaniline and S-vinyl-2-picoline condense in the presence of sodium metal to give 5-( -methyl-2-phenylaminoethyl)pyridine (IX-269). ... 

Several attempts were made to homoplymerize MAH with basic or acidic initiators. Preferentially used were tertiary amines such as triethylamine [956], pyridine [942,957-960], picolines [961], vinyl-pyridine [959,962] and imidazole [963]. Typical for... 

During preparation of polyelectrolytes from poly(4-vinyl-pyridine) (P-4-VP) and alkyl halides, some puzzling phenomena were observed by Coleman and Fuoss. These authors found quaternization of pyridine, 4-picoline and 4-isopropylpyridine with n-butyl bromide in tetramethylene sulfone followed normal second-order kinetics. Similar results were reported by Hinshelwood and coworkersfor the reaction of pyridine and alkyl halides. However, on quaternization of poly(4-vinylpyridine) under the same conditions, they observed... 

The dual application of ALA with one or more chlorophyll biosynthesis modulators can result in selective herbicide action due to the four different greening patterns within the multibranched chlorophyll pathway that occur in plants. " The chlorophyll biosynthesis modulators are classified into three major groups depending on their mode of action enhancers of ALA conversion to tetrapyrroles (e.g., 2-pyridine aldehyde, picolinic acid, 4,4 -dipyridyl, phenanthridine, 2,2 -pyridylamine) inducers of tetrapyrrole accumulation (e.g., 1,10-phenanthroline, 2,2 -dipyridyl) and inhibitors of mono vinyl protochlorophyllide accumulation (1,7- and 4,7-phenanthroline, 2,3-dipyridyl, 2,4-dipyridyl). ... 

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