Zobrazeno 1 - 10
of 13
pro vyhledávání: '"S. E. Schaafsma"'
Publikováno v:
Recueil des Travaux Chimiques des Pays-Bas. 86:1301-1312
On oxidation of 1-methoxycyclopropanol 1 by ammoniacal cupric sulfate, methyl acrylate 4a and dimethyl adipate 3a are formed exclusively in high yield. It is shown that the latter compound is formed from the intermediate radical 2 by dimerisation and
Publikováno v:
Recueil des Travaux Chimiques des Pays-Bas. 86:651-654
On adding a slight excess of water to cyclopropanone, 1,1-dihydroxycyclopropane (cyclopropanone hydrate) can be isolated in a high yield. The hydrate adds to cyclopropanone giving a mixture of α,ω-dihydroxypoly-(oxycyclopropylidenes), which are iso
Publikováno v:
Recueil des Travaux Chimiques des Pays-Bas. 84:113-117
Methyl malonate (A), methyl succinate (B), methyl glutarate (C) and methyl 3-oxocyclobutanecarboxylate (D) are formed from diazomethane and carbon suboxide in the presence of methanol. A mechanism is proposed for this reaction.
Publikováno v:
Recueil des Travaux Chimiques des Pays-Bas. 89:535-544
The reaction of bromine with a variety of dimethyl acetals at − 60° in sulfur dioxide is described. Electrophilic attack of bromine on oxygen leads to methyl hypobromite (CH3OBr) together with mono methoxycarbenium bromide or - depending on the st
Publikováno v:
Recueil des Travaux Chimiques des Pays-Bas. 85:70-72
The isomerisation of cyclopropanone hemiacetal to propionic ester can be suppressed by metal ions such as Ag+ and Cu2+. These mild oxidising agents can lead to adipic ester (up to 80%) through dimerisation of a radical CH2CH2COOR (III) detectable by
Publikováno v:
Recueil des Travaux Chimiques des Pays-Bas. 86:417-418
Publikováno v:
Recueil des Travaux Chimiques des Pays-Bas. 86:419-420
Publikováno v:
Recueil des Travaux Chimiques des Pays-Bas. 85:73-74
Publikováno v:
Tetrahedron Letters. 14:827-830
Publikováno v:
Tetrahedron Letters. 10:467-470