Your browser doesn't support javascript.
loading
Show: 20 | 50 | 100
Results 1 - 2 de 2
Filter
Add filters








Language
Year range
1.
Rev. colomb. quím. (Bogotá) ; 34(2): 105-115, dic. 2005. ilus, graf, tab
Article in Spanish | LILACS | ID: lil-636567

ABSTRACT

Se ensayaron algunos fenoles como nucleófilos en la reacción tipo Mannich en medio básico frente al aminal macrocíclico 1,3,6,8-tetrazatriciclo [4.4.1.1(3,8)] dodecano (TATD). Dependiendo del grado de sustitución del fenol empleado, se obtuvieron: 1,3- bis- [2’- hidroxibencil] imidazolidinas regioselectivamente, 2,6-di[3’- (2’’-hidroxibencil)-1’-metilenimidazolidin]fenoles y 3,3’-etilen-bis-(3,4-dihidro-2H-1,3-benzoxazinas).


Several phenols were tested as nucleophilesin Mannich-type reactions with the macrocyclic aminal 1,3,6,8-tetraazatricyclo[4.4.1.1(3,8)]dodecane (TATD) in basic medium. Depending on the degree of substitution of the phenol employed,1,3-bis-[2’-hydroxybenzyl]imidazolidines, 2,6-di[3’-(2’’-hydroxybenzyl)-1’- methyleneimidazolidin] phenols and 3,3’-ethylene-bis-(3,4-dihydro-2H-1,3- benzoxazines) were obtained.

2.
Rev. colomb. quím. (Bogotá) ; 34(2): 117-125, dic. 2005. ilus, graf, tab
Article in Spanish | LILACS | ID: lil-636568

ABSTRACT

Durante el estudio químico de la fracción esterólica del hongo Pleurotus sajor-caju se estableció que el dehidroergosterol (ergosta-5,7,9(11),22-tetraen-3-ol) presente en el extracto posiblemente no es un producto natural sino un artefacto producido durante el proceso de extracción de los esteroles con cloroformo. Este hecho se atribuyó a la presencia de sustancias fenólicas en el extracto.


During the extraction of sterolic fraction of Pleurotus sajor-caju was established that dehydroergosterol (ergosta-5,7,9 (11), 22-tetraen-3-ol) present in the extract is possibly not a natural product but an artifact produced during the process of extraction of sterols with chloroform. This was attributed to the presence of phenolic substances in the extract.

SELECTION OF CITATIONS
SEARCH DETAIL