2007
Formation of Thioureas by Reaction of Isothiocyanates with Weakly Basic or Betaine Amines Promoted by DMAP
ŠIMBERA, Jan a Pavel PAZDERAZákladní údaje
Originální název
Formation of Thioureas by Reaction of Isothiocyanates with Weakly Basic or Betaine Amines Promoted by DMAP
Název česky
Vznik thiomočovin reakcí isothiokyanátů s málo bazickými nebo betainovými aminy iniciované DMAP
Autoři
ŠIMBERA, Jan a Pavel PAZDERA
Vydání
Bratislava, 1 s. ChemZi 3/1, 2007
Nakladatel
Slovenská chemická spoločnost
Další údaje
Jazyk
angličtina
Typ výsledku
Účelové publikace
Obor
10401 Organic chemistry
Stát vydavatele
Slovensko
Utajení
není předmětem státního či obchodního tajemství
Kód RIV
RIV/00216224:14310/07:00022936
Organizační jednotka
Přírodovědecká fakulta
ISSN
Klíčová slova anglicky
Dimethylaminopyridine thioureas organic isothiocyanate inverted PTC
Příznaky
Mezinárodní význam, Recenzováno
Změněno: 30. 3. 2010 12:12, doc. RNDr. Pavel Pazdera, CSc.
V originále
Several thousand papers and patents refer since 1970s that activation of acyl, alkoxycarbonyl or aryloxycarbonyl synthons for their coupling with N, O, C nucleophiles may be very effectively realized by an addition of 4 N,N dialkylaminopyridine (DMAP) in catalytic amount [1]. On the other hand, formation of thioureas is not easy for reactions starting from small reactive isothiocyanates (e. g. alkyl, electron donor substituted aryl or heteroaryl isothiocyanates) and/or weakly basic or betaine amines (amino acids). The last mentioned betaines are insoluble in non polar organic solvents and reactions must be frequently carried out for the most part in heterogenous two phase systems or in water organic solvents mixture very often with poor yields. The activation of organic isothiocyanates for reactions with small reactive isothiocyanates and/or weakly basic or betaine amines by DMAP will be demonstrated.
Česky
Several thousand papers and patents refer since 1970s that activation of acyl, alkoxycarbonyl or aryloxycarbonyl synthons for their coupling with N, O, C nucleophiles may be very effectively realized by an addition of 4 N,N dialkylaminopyridine (DMAP) in catalytic amount [1]. On the other hand, formation of thioureas is not easy for reactions starting from small reactive isothiocyanates (e. g. alkyl, electron donor substituted aryl or heteroaryl isothiocyanates) and/or weakly basic or betaine amines (amino acids). The last mentioned betaines are insoluble in non polar organic solvents and reactions must be frequently carried out for the most part in heterogenous two phase systems or in water organic solvents mixture very often with poor yields. The activation of organic isothiocyanates for reactions with small reactive isothiocyanates and/or weakly basic or betaine amines by DMAP will be demonstrated.
Návaznosti
| MSM 143100011, záměr |
| ||
| 2A-1TP1/090, projekt VaV |
|