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Cited by 30 publications
(7 citation statements)
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“…In the course of the reaction after the first addition of one molecule of indole to the aldehyde, unstable intermediate 7 would promote the elimination of Ag(I), in the form of AgOH, to give azafulvene 8 [ 51 52 ]. Finally, the iminium 8 would undergo a further addition of a second molecule of indole to produce the final observed products 6 [ 53 ].…”
Section: Resultsmentioning
confidence: 99%
“…In the course of the reaction after the first addition of one molecule of indole to the aldehyde, unstable intermediate 7 would promote the elimination of Ag(I), in the form of AgOH, to give azafulvene 8 [ 51 52 ]. Finally, the iminium 8 would undergo a further addition of a second molecule of indole to produce the final observed products 6 [ 53 ].…”
Section: Resultsmentioning
confidence: 99%
“…The colorimetric method described in this work is based on the reaction of formaldehyde with indole or carbazole derivatives. From the time of its discovery by Emil Fischer (8)(9)(10) it was studied extensively (11)(12)(13)(14)(15)(16)(17)(18)(19)(20), but for a long time its analytical applications were limited only to the sensitive qualitative or semiquantitative test for indole derivatives or proteins (21)(22)(23)(24).…”
Section: Resultsmentioning
confidence: 99%
“…Reaction of 2-methyl-3-benzylideneindolenium hydrogen sulfate (XII) (16) with Ia in ethanol for 20 hours at room temperature under a nitrogen stream afforded 15% of phenylglyoxylic acid ethyl ester (IIIa), 19% of thiamine hydro gen sulfate (XIII), which was confirmed by converting to hydrochloride, and a small amount of 2-methyl-3-benzylindole (XIV) accompanied by a complex mixture of unidentified materials. Similarly, the reaction of Ia with N-methylm cotinamide chloride (XV) in ethanol gave 15% of IIIa and 10% of thiamine monochloride (VIII).…”
Section: Figmentioning
confidence: 99%