Patent IE-822266-L (IE)
Title: Aminomethyl ih-indole-4-methanol derivatives¹antihypertensives
IPC: C07D209/08
Filed: 1982-09-16
Abstract: 1. Claims for the Contracting States : BE, CH, DE, FR, GB, IT, LI, LU, NL, SE Derivates of aminomethyl 1H-indol-4-methanol as well as their salts of addition with mineral or organic acids, characterized in that they answer to the general formula I :  see diagramm : EP0076713,P28,F1  in which R represents a hydrogen atom, or an alkyl radical containing from 1 to 6 carbon atoms or a phenyl alkyl radical containing from 7 to 10 carbon atoms and R1 and R2 , being identical or different, each represents a hydrogen atom, a linear or branched alkyl radical containing from 1 to 8 carbon atoms, possibly substituted, except in the case of the methyl radical, by one or more halogen atoms or by one or more hydroxy, phenyl or phenoxy radicals themselves possibly substituted by one or more halogen atoms or by one or more hydroxy, methyl, methoxy or acetamido radicals, R1 and R2 can also represent a cycloalkyl radical containing from 3 to 7 carbon atoms, a cycloalkylalkyl radical containing from 4 to 7 carbon atoms or an allyl or propargyl radical and the dotted line represents the possible presence of a carbon-carbon bond. 1. Claims for the Contracting State : AT Process for preparing derivatives of aminomethyl 1H-indol-4-methanol as well as their salts of addition with mineral or organic acids, answering to the general formula I : see diagramm : EP0076713,P31,F2  in which R represents a hydrogen atom, or an alkyl radical containing from 1 to 6 carbon atoms or a phenyl alkyl radical containing from 7 to 10 carbon atoms and R1 and R2 , being identical or different, each represent a hydrogen atom, a linear or branched alkyl radical containing from 1 to 8 carbon atoms, possibly substituted, except in the case of the methyl radical, by one or more halogen atoms or by one or more hydroxy, phenyl or phenoxy radicals themselves possibly substituted by one or more halogen atoms or by one or more hydroxy, methyl, methoxy or acetamido radicals, R1 and R2 can also represent a cycloalkyl radical containing from 3 to 7 carbon atoms, a cycloalkylalkyl radical containing from 4 to 7 carbon atoms or an allyl or propargyl radical and the dotted line represents the possible presence of a carbon-carbon bond, characterized in that a product with the formula II :  see diagramm : EP0076713,P31,F4  in which R has the significance already indicated, is made to react with trimethyl silyl cyanide, so as to obtain a product with the formula III :  see diagramm : EP0076713,P31,F5  in which R has the significance already indicated, which is reduced, so as to obtain a product with the formula IA :  see diagramm : EP0076713,P32,F1  in which R has the significance already indicated which : either is isolated, and if desired, is salified, or the said product with the formula IA is made to react with a carbonyl derivative with the formula IV :  see diagramm : EP0076713,P32,F3  in which R alpha and R beta are such that :  see diagramm : EP0076713,P32,F5  has the significance of R1 already indicated with the exception of a hydrogen atom and a methyl radical, in the presence of a reducing agent, so as to obtain a product with the formula IB :  see diagramm : EP0076713,P32,F7  or I'B  see diagramm : EP0076713,P32,F9  in which R, R alpha and R beta have the significance already indicated, which product with the formula IB or I'B is isolated and if desired, salified or which product with the formula IB is submitted to the action of a halogenide with the formula V : X-R'2 in which X represents a chlorine, bromine or iodine atom, and R'2 has the significance of R2 already indicated with the exception of hydrogen, so as to obtain a product with the formula IC :  see diagramm : EP0076713,P32,F2  in which R, R alpha, R beta and R'2 have the significance already indicated which is isolated and if desired, salified, or the said product with the formula IA is made to react with a carbonyl derivative with the formula IVa :  see diagramm : EP0076713,P32,F4 in which Hal represents a chlorine, bromine or iodine atom, and  see diagramm : EP0076713,P32,F6  is such that -CH2 -R'1 has the significance of R1 already indicated, with the exception of a hydrogen atom and of the methyl radical, then the derivative obtained is submitted to the action of a reducing agent, so as to obtain a product with the formula ID :  see diagramm : EP0076713,P32,F8  in which R and R'1 have the significance already indicated, which product with the formula ID is either isolated and if desired, salified, or is submitted to the action of a halogenide with the formula V : X-R'2 in which X and R'2 have the significance already indicated, so as to obtain a product with the formula IE :  see diagramm : EP0076713,P32,F10  in which R, R'1 and R'2 have the significance already indicated, which is isolated, and if desired, salified, or the said product with the formula IA is submitted to methylation, so as to obtain a product with the formula IF :  see diagramm : EP0076713,P33,F2  in which R has the significance already indicated, which is either isolated, and if desired, salified, or is made to react with a halogenide with the formula V defined above, so as to obtain a product with the formula IG :  see diagramm : EP0076713,P33,F4  in which R and R'2 have the significance already indicated, which is isolated and if desired, salified, and if desired, the said products with the formulae IA , IB , I'B , IC , ID , IE , IF and IG , are submitted to the action of a reducing agent of the indole nucleus, so as to obtain a product with the formula I' : see diagramm : EP0076713,P33,F7  in which R, R1 and R2 have the significance already indicated, which is isolated, and if desired, salified.