1,3-Dinitro-2-(indol-3'-yl)-propanes 3 are synthesized by Michael reaction of nitromethane with the indolylnitroethenes 2. Reaction of the aldehydes 4 and 10 with the benzylamines 12 as well as the reaction of the indolylalkylamines 6a and 9a with the benzaldehydes 11 lead to Schiff bases which are reduced to N-benzyl-(indol-3-ylmethyl)-amines 13 and N-benzyl-(indol-3-ylethyl)-amines 14, respectively; tert amines 16 are synthesized via the formamides 15, amines 18 are prepared according to Mannich. Inhibitory effects on Mycobacterium tuberculosis H 37 Ra are investigated, a structure-activity relationship is discussed.
1,3-Diaminopropane sind bekannt'). Schwierigkeiten gibt es bei ihrer Synthese durch Reduktion von Malodinitrilvorstufen2).Zur Darstellung der 1.3-Diaminopropanstktur 2 wird die in Schema 1 gezeigte Synthese beschrieben3).Dabei werden Monoalkylmalcdinitrile 1 mit LiAlH4 zu den entspr. Diaminen 2 reduziert, welche nach Etherspaltung zu den R(II)-Kornplexen 3 umgesetzt und auf endokrine Eigenschaften hm untersucht ~u r d e n~) ,~) .Der fur die Synthese des ahnlichen Systems 5 (R = H, Schema 2) gezeigte Weg einer LiAIh-Reduktion des monoalkylierten Malodinids 4 ist unbrauchbd). Ehrensperger hatte aber Erfolg rnit der Reduktion des dialkylierten Malodinitrils 7 zum 1,3-Diaminopropan 6 (R = CH3). Auch die Reduktion des ungesattigten 1,l-Dicyanoethens 8 mit NaBH, fiihrt nicht zu 5, sondern zu einer Verbindung, der die vetmutete Struktur 9 zugeordnet wird".In eigenen Untersuchungen erhielten wir Temp.-abhhgig jeweils ein Produkt (Schema 3). Die Reduktion des ungesattigten I, 1 -Dicyanoethens 115) mit NaBH4 liefert bei 0°C das gewunschte Dicyanoalkan 10, arbeitet man dagegen bei 40°C, so entsteht in quantitativer Ausb. der Iminomethyl- Arch.
Knoevenagel-reaction of indol-3-carbaldehydes 5a,b and 7a,b with nitromethane leads to the nitroethenes 12 and 14, the analogous reaction with malodinitrile to the methylidenemalonic acid dinitriles 16.- Michael-addition of nitromethane at 12 and 14 affords the 1,3-dinitropropanes 13 and 15, reduction of 16 the methylmalonic acid dinitriles 17.- Reaction of indoles 3 with n-BuLi/phenylsulfonylchloride leads to the 3-chloroindoles 18, reaction with NaH/ethyliodide, either cleavage and acylation to derivatives 19.- Compounds 7-11, 14-17, and 19 show affinity to the estrogen receptor. Compounds 7b, 9-11, 17b, and 19b inhibit the growth of MCF-7- and MDA-MB-231-cells. IC50-values are determined and structure-activity relationships are discussed.
ChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 100 leading journals. To access a ChemInform Abstract of an article which was published elsewhere, please select a “Full Text” option. The original article is trackable via the “References” option.
ChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 100 leading journals. To access a ChemInform Abstract of an article which was published elsewhere, please select a “Full Text” option. The original article is trackable via the “References” option.
scite is a Brooklyn-based organization that helps researchers better discover and understand research articles through Smart Citations–citations that display the context of the citation and describe whether the article provides supporting or contrasting evidence. scite is used by students and researchers from around the world and is funded in part by the National Science Foundation and the National Institute on Drug Abuse of the National Institutes of Health.