Zobrazeno 1 - 10
of 260
pro vyhledávání: '"Sven-Olov Lawesson"'
Publikováno v:
Bulletin des Sociétés Chimiques Belges. 84:341-360
On reaction with R-Hal, salts of ethyl phenylcyanopyruvate, dialkyl oxalacetate and their derivatives undergo 0-alkylation in almost all cases. Also mono- and disubstitutions on carbon are observed. The structure of the product from alkylation of the
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::b55beeaba6753b94d821500f143b1f0a
https://doi.org/10.1002/bscb.19750840409
https://doi.org/10.1002/bscb.19750840409
Publikováno v:
Recueil des Travaux Chimiques des Pays-Bas. 93:252-256
Heating hexamethylphosphoric triamide (HMPA) with phenols at about 230° for 20-30 hours yields a mixture of mono- and di-substituted esters of phosphoramidic acidsP(O)(NMe2)n-(Oψ3-n n = 1,2 and in some cases rather high yields of triesters of phosp
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::de3e57fd5bc716ca3ad3cf97a88241e2
https://doi.org/10.1002/recl.19740930906
https://doi.org/10.1002/recl.19740930906
Publikováno v:
Recueil des Travaux Chimiques des Pays-Bas. 83:464-468
Methyl vinyl ketone has been condensed with t-butyl acetoacetate (and its 2-alkyl and aralkyl derivatives) in the molar ratio of one to one and the infrared spectra have been examined. It is concluded that by a spontaneous cyclization the products ar
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::4c8f77ae18e20e0f5e793f458482b1ce
https://doi.org/10.1002/recl.19640830505
https://doi.org/10.1002/recl.19640830505
Autor:
Peter T. Madsen, Sven-Olov Lawesson
Publikováno v:
Recueil des Travaux Chimiques des Pays-Bas. 85:753-756
Dienamines have been prepared by reacting n-alkyl methyl ketones with morpholine. It is suggested that the initial step in the reaction is a condensation of two ketone molecules to an α,β-unsaturated ketone followed by the reaction with morpholine.
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::19a12036b7a1d0a7cee108a77394d822
https://doi.org/10.1002/recl.19660850712
https://doi.org/10.1002/recl.19660850712
Publikováno v:
Recueil des Travaux Chimiques des Pays-Bas. 82:791-797
2-Hydroxythiophen exists at room temperature mainly in the tautomeric form 2(5H)-thiophenone13 and is conveniently prepared3 by splitting 2-thienyl t-butyl ether by heating it with catalytic amounts of p-toluenesulphonic acid at about 150°. 2(5H)-Th
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::14750c48b878898a1ff3dd107eb88b06
https://doi.org/10.1002/recl.19630820807
https://doi.org/10.1002/recl.19630820807
Autor:
J. Kristensen, Sven-Olov Lawesson
Publikováno v:
Bulletin des Sociétés Chimiques Belges. 87:609-614
The title compound, III, has been reacted with sodium phenylthiolate and morpholine and the substitution products IV and V respectively, have been isolated. No Michael addition was observed. Potassium cyanide and NaBH4 do react with III according to
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::2a4bbc41f3cf03ec9a69094693408121
https://doi.org/10.1002/bscb.19780870805
https://doi.org/10.1002/bscb.19780870805
Autor:
H. Kolind-Andersen, Sven-Olov Lawesson
Publikováno v:
Bulletin des Sociétés Chimiques Belges. 86:543-550
Reaction of α-bromoacrylonitrile with enamine derived from aldehydes produces cyclobutanes while enamines from ketones primarily give quaternary ammonium salts. From 1-morpholino-1-cyclohexene also a cyclobutane was isolated. Reactions of the ammoni
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::98a06d227433d8c4dc3722983c989d7f
https://doi.org/10.1002/bscb.19770860708
https://doi.org/10.1002/bscb.19770860708
Publikováno v:
Bulletin des Sociétés Chimiques Belges. 87:517-523
Compounds containing the (XO or S) unit yield negative-ion spectra, which are dominated by peaks arising by α or s cleavage to PX. Molecular ions are generally absent in these spectra, except in cases where the molecule contains an additional electr
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::a94206d44465921f665dc3802227ce1b
https://doi.org/10.1002/bscb.19780870703
https://doi.org/10.1002/bscb.19780870703
Publikováno v:
Bulletin des Sociétés Chimiques Belges. 87:621-626
A number of N,N-diacetylamines has been prepared in generally high yields by acetylation of primary amines with acetic anhydride in presence of magnesium and catalytic amounts of Cu(OAc)2. The general physical and also some chemical properties of N,N
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::2343c15bd8158a71a76e60af8653b16a
https://doi.org/10.1002/bscb.19780870807
https://doi.org/10.1002/bscb.19780870807
Publikováno v:
Bulletin des Sociétés Chimiques Belges. 90:75-82
Alkylation of ethyl 3-amino-2-butenoate, 1, with methyl iodide, ethyl iodide, and benzyl bromide gave both C- and N-alkylated products (contrary to earlier findings) the ratio of which was determined by GLC. Methylation of 1 was studied under differe
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::b57d0844f1612c48b41d905aadb848e8
https://doi.org/10.1002/bscb.19810900112
https://doi.org/10.1002/bscb.19810900112