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Duppa

This preparation was discovered independently by Geuther (1863) and by Frankland and Duppa (1865). The reaction was subsequently investigated in detail and so w idely extended by Claisen that it has become solely a specific example of the more general process known as the Claisen Condensation. Claisen showed that an ester under the influence of sodium ethoxide would not only condense with itself (as in the preparation of ethyl acetoacetate), but also with (i) another ester, (ii) a ketone, if of formula RCHgCOR, (iii) a nitrile, if of formula RCH CN, in each case with the elimination of alcohol. Examples of these modifications are ... [Pg.265]

As discussed previously, A. Geuther described the former, Edward Frankland and B. F. Duppa the latter. [Pg.190]

Laurent regarded glycocoll as belonging to the ammonia type of organic compounds it was supposed by Cahours to be a derivative of acetic acid, which supposition was only proved by its synthesis from brom-acetic acid and ammonia by Perkin and Duppa, and from chloracetic acid and ammonia by Cahours, both in 1858 —... [Pg.29]

Reaction XLI3I. (d) Condensation of Diethyl Oxalate with Alkyl Halides in the presence of Zinc (Frankland- -Duppa). (A., 185, 184.)—This is a type of condensation very similar to those just described. The zinc alkyl is not isolated, and simple halogen compounds are used. The product is a derivative of glycollic acid. [Pg.135]

About the same time Frankland and Duppa, using the same reaction, discovered that the hydrogen atoms of the methylene group are replaceable by sodium and various organic radicles. [Pg.6]

Geuther represented the substance as CHg.C OH) CH.COOC2H6, that is /3-hydroxycrotonic ester, but Frankland and Duppa preferred the keto formula CH8.CO.CH2.COOC2H6, and represented it as aceto-acetic ester,7... [Pg.6]

It was prepared for the first time by Perkin and Duppa by treating bromoacetic acid with ethyl alcohol in a closed tube for I hour in the cold ... [Pg.119]

Perkin and Duppa, commencing with ethyl bromoacetate and potassium iodide, prepared ethyl lodoacetate for the first time. [Pg.121]

Diethyl oxalate or ethyl oxalyi chloride. a-Oxydiethyl-acetic ethyl ester. Pranidand, Annalen, 1863, 126, 109 Prankland and Duppa, Anmleti, 1865, 135, 29 Henry, Ber., 1872, 5, 950. [Pg.22]

Halogens, e.f/. iodine. Alcoholic solution. Methyl mercury iodide methyl iodide, Buekton, AnnaU-n, 1858, io8, 103 Frankland and Duppa, Trans. Claim. Noc., 1863, x6, 415 Annalen 1864, 130, 104 Hilpert andDitmar, Ber, 1913, 46, 3738. [Pg.32]

Mercuric chlrjr-icle. Heat with rather less than calculated quantity of HgCla or alcoholic solution. Etliyl mercuric chloride. Franldand, Annalen, 1850, ill, 60 Jahresber., 1859, p. 413 Erankland and Duppa, Trmis. Ghem. Soc. 1863, i6, 415 Annahn, 1864, 130, 104. [Pg.35]

Cadrainm. Heat at 100- 130 C. Cadmium diethyl (not free from mercury). Frankland and Duppa, Tran Chem. Soc., 1864, 17, Annalen, 1S64, 130, 117. [Pg.36]

Iron (reduced from sesfjui-oside by hydrogen). I r i t Metallic mercury, no trace of organic compound. Franidand and Duppa-, loc. cit. [Pg.36]

See other pages where Duppa is mentioned: [Pg.256]    [Pg.304]    [Pg.83]    [Pg.90]    [Pg.113]    [Pg.27]    [Pg.20]    [Pg.131]    [Pg.369]    [Pg.78]    [Pg.83]    [Pg.113]    [Pg.256]    [Pg.211]    [Pg.383]    [Pg.992]    [Pg.52]    [Pg.304]    [Pg.8]    [Pg.57]    [Pg.40]    [Pg.83]    [Pg.211]    [Pg.5248]    [Pg.119]    [Pg.121]    [Pg.343]    [Pg.209]    [Pg.40]    [Pg.17]    [Pg.19]    [Pg.25]    [Pg.33]    [Pg.33]    [Pg.38]   
See also in sourсe #XX -- [ Pg.135 ]

See also in sourсe #XX -- [ Pg.155 ]



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