[EN] ENVIRONMENT-FRIEND PROCESS FOR THE SYNTHESIS OF QUATERNARY AMMONIO-STERO?DS<br/>[FR] PROCEDE NON POLLUANT DE SYNTHESE D'AMMONIO-STEROIDES QUATERNAIRES
申请人:RICHTER GEDEON VEGYESZET
公开号:WO2006038047A1
公开(公告)日:2006-04-13
The invention relates to a new, environment-friend process for the synthesis of the known 4,4'-[3α,17β-bis(acetoxy)-5α-androstane-2β,l6β-diyl]-bis(l,l-dimethyl-ρiρerazinium) dibromide of formula (I) (from now on pipecuronium bromide) and l-[3α,17β-bis(acetoxy)-2β-(l-piperidinyl)-5α-androstane-16β-yl]-l-methyl-piperidinium bromide of formula (II) (from now on vecuronium bromide). Furthermore the invention relates to the new intermediates of formula (III) and formula (IV) of the process, wherein the meaning of X is benzenesulfonate - in given case para-substituted with a methyl or a nitro group or a bromine atom - methanesulfonate, ethanesulfonate or trifluoromethanesulfonate ion.
[EN] NOVEL METHOD FOR SYNTHESIS OF NEUROMUSCULAR BLOCKING AGENTS<br/>[FR] NOUVEAU PROCÉDÉ DE SYNTHÈSE D'AGENTS DE BLOCAGE NEUROMUSCULAIRES
申请人:NEON LAB LTD
公开号:WO2016009442A1
公开(公告)日:2016-01-21
The invention discloses a novel method for preparing neuromuscular blocking agents using aryl esters as a reagent of di-acylation as well as highly regioselective mono-acylation of androstane-diols.
[EN] NOVEL PROCESS FOR QUATERNIZATION OF (2P,3A,5A,16P,17P)-2,16-BISPIPERIDINO-3,17-DIACETOXY-5-ANDROSTANE<br/>[FR] NOUVEAU PROCÉDÉ DE QUATERNISATION DE (2?,3?,5?,16?,17?)-2, 16-BISPIPÉRIDINO-3,17-DIACÉTOXY-5-ANDROSTANE
申请人:NEON LAB LTD
公开号:WO2012147090A1
公开(公告)日:2012-11-01
The invention discloses a novel process for quaternization of (2β,3α,5α,16β,17β)-2,16-bispiperidino-3,17-diacetoxy-5-androstane with methyl bromide in presence of a cyclic ether. The invention further discloses purification of quaternary salt to provide highly pure vecuronium bromide with unspecified impurity level not more than 0.1%.
Acid addition salts of 16-beta-monoquaternary ammonium derivatives of 2-beta, 16-beta-bis-piperidino-androstanes and pharmaceutical preparations containing same