[EN] SELECTIVE CHLORINATION OF STEROIDS AND OTHER SUBSTRATES DIRECTED BY COVALENTLY LINKED AGENTS COMPRISING A NITROGEN-CONTAINING RING ACTING AS TEMPLATES
申请人:THE TRUSTEES OF COLUMBIA UNIVERSITY IN THE CITY OF
公开号:WO1988009337A1
公开(公告)日:1988-12-01
(EN) This invention concerns a method of substituting a chlorine atom for a predetermined hydrogen atom located within an organic compound which comprises contacting the organic compound containing the predetermined hydrogen atom with an esterifying agent comprising a nitrogen-containing ring or a substituted or fused ring derivative of a nitrogen-containing ring so as to produce an ester and treating the ester with a chlorinating agent so as to substitute the chlorine atom for the predetermined hydrogen atom. The ester comprises the nitrogen-containing ring or the substituted or fused ring derivative of the nitrogen-containing ring so positioned within the ester with respect to the predetermined hydrogen atom that a chlorine atom attached to the nitrogen atom of the nitrogen-containing ring or substituted or fused ring derivative of the nitrogen-containing ring reacts with the predetermined hydrogen atom. Another aspect of the invention is a method for converting a predetermined single bond between a carbon atom and another atom in an organic compound into a double bond between the carbon atom and the other atom which comprises substituting a chlorine atom for a predetermined hydrogen atom bound to the carbon atom or the other atom of the organic compound according to the method of this invention so as to produce a chlorine-containing compound and then treating the chlorine-containing compound so as to eliminate the chlorine atom from the compound and form the double bond.(FR) Un procédé de substitution d'un atome d'hydrogène prédéterminé situé dans un composé organique par un atome de chlore comprend la mise en contact du composé organique contenant l'atome d'hydrogène prédéterminé avec un agent estérifiant qui comprend une combinaison cyclique contenant de l'azote ou une combinaison cyclique substituée ou condensée dérivée d'une combinaison cyclique contenant de l'azote afin de produire un ester, puis le traitement de l'ester avec un agent chlorant afin de substituter l'atome d'hydrogène prédéterminé par l'atome de chlore. La combinaison cyclique contenant de l'azote ou la combinaison cyclique substituée ou condensée dérivée de la combinaison cyclique contenant de l'azote est située de telle sorte dans l'ester par rapport à l'atome prédéterminé d'hydrogène qu'un atome de chlore relié à l'atome d'azote de la combinaison cyclique contenant de l'azote ou de la combinaison cyclique substituée ou condensée dérivée de la combinaison cyclique contenant de l'azote régit avec l'atome d'hydrogène prédéterminé. Un procédé de conversion d'une liaison simple prédéterminée entre un atome de carbone et un atome d'un composé organique en une liaison double entre l'atome de carbone et l'autre atome comprend la substitution par un atome de chlore d'un atome d'hydrogène prédéterminé lié à l'atome de carbone ou à l'autre atome de composé organique selon le procédé décrit ci-dessus, afin de produire un composé contenant du chlore, puis le traitement du composé contenant du chlore afin d'éliminer l'atome du chlore du composé et de former la double liaison.
Selective chlorination of steroids and other substrates directed by
申请人:The Trustees of Columbia in the City of New York
公开号:US04920216A1
公开(公告)日:1990-04-24
This invention concerns a method of substituting a chlorine atom for a predetermined hydrogen atom located within an organic compound which comprises contacting the organic compound containing the predetermined hydrogen atom with an esterifying agent comprising a pyridine ring or a substituted or fused ring derivative of a pyridine ring so as to produce an ester and treating the ester with a chlorinating agent so as to substitute the chlorine atom for the predetermined hydrogen atom. The ester comprises the pyridine ring or the substituted or fused ring derivative of the pyridine ring so positioned within the ester with respect to the predetermined hydrogen atom that a chlorine atom attached to the nitrogen atom of the pyridine ring or substituted or fused ring derivative of the pyridine ring reacts with the predetermined hydrogen atom. Another aspect of the invention is a method for converting a predetermined single bond between a carbon atom and another atom in an organic compound into a double bond between the carbon atom and the other atom which comprises substituting a chlorine atom for a predetermined hydrogen atom bound to the carbon atom or the other atom of the organic compound according to the method of this invention so as to produce a chlorine-containing compound and then treating the chlorine-containing compound so as to eliminate the chlorine atom from the compound and form the double bond.