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Benzyl Bromide related reagents

The use of carbon nucleophiles stabilized by SR groups has been a feature of sulphur chemistry for many years now, and this year has seen additional uses for these versatile reagents. Thus the carbanion CH(SPh)2 adds in a 1,2-manner to 2-methylacrolein giving the allyl alcohol (175), which is then converted to the activated diene (176) by standard methodology. The latter has been used in studies towards the total synthesis of the Rubradirin antibiotics. The related anion ArC(SPh)2 also adds to a,/3-unsaturated systems however, in the case of lactone (177) conjugate addition is observed. If the initial ion from (177) is trapped with benzylic bromides then frans-butyrolactones (178) are obtained in good yield. ... [Pg.271]

Related Reagents. Benzyl Chloride Benzyl Iodide Benzyl p-Toluenesulfonate Benzyl 2,2,2-Triehloroacetimidate Benzyl Trifluoromethanesulfonate 3,4-Dimethoxybenzyl Bromide p-Methoxybenzyl Chloride 4-Methoxybenzyl 2,2,2-Triehloroacetimidate. [Pg.46]

Related Reagents. Benzyl Bromide Benzyl Chloride Benzyl Iodide Benzyl Trifluoromethanesulfonate 3,4-Dimethoxybenzyl... [Pg.52]

Related Reagents. Benzyl Chloride Benzyl 2,2,2-Trichloroacetimidate Benzyl Trifluoromethanesulfonate p-methoxy benzyl bromide p-methoxy 2,2,2-trichloroacetimidate. [Pg.152]

Zinc chloride was used as a catalyst in the Friedel Crafts benzylation of benzenes in the presence of polar solvents, such as primary alcohols, ketones, and water.639 Friedel-Crafts catalysis has also been carried out using a supported zinc chloride reagent. Mesoporous silicas with zinc chloride incorporated have been synthesized with a high level of available catalyst. Variation in reaction conditions and relation of catalytic activity to pore size and volume were studied.640 Other supported catalytic systems include a zinc bromide catalyst that is fast, efficient, selective, and reusable in the /wa-bromination of aromatic substrates.641... [Pg.1202]

Attempted detritylation of methyl 4-0-benzyl-2,3-dideoxy-6-0-trityl-a-D-en/thro-hex-2-enopyranoside with hydrogen bromide caused addition to the double bond and also 1,6-anhydride formation, to give l,6-anhydro-4-0-benzyl-3-bromo-2,3-dideoxy-D-arafcino-hexose,938 so that the addition is related to that occurring when tri-O-acetyl-D-glucal is treated with this reagent in acetic acid.18... [Pg.236]

See other pages where Benzyl Bromide related reagents is mentioned: [Pg.202]    [Pg.1005]    [Pg.41]    [Pg.232]    [Pg.36]    [Pg.276]    [Pg.181]    [Pg.92]    [Pg.92]    [Pg.17]    [Pg.47]    [Pg.607]    [Pg.987]    [Pg.302]    [Pg.46]    [Pg.150]    [Pg.243]    [Pg.37]    [Pg.286]    [Pg.298]    [Pg.70]    [Pg.43]    [Pg.241]    [Pg.316]    [Pg.92]    [Pg.3]    [Pg.33]    [Pg.903]    [Pg.31]    [Pg.46]    [Pg.184]    [Pg.210]    [Pg.18]    [Pg.265]   
See also in sourсe #XX -- [ Pg.46 ]



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Benzyl bromide

Benzyl reagent

Benzylic bromide

Related reagents

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