Derivatives of octahydro-6,10-dioxo-6H-pyridazino [1,2-a] [1,2] diazepine-1-carboxylic acid, their preparation process and their use in the preparation of therapeutically active compounds
Method of preparing bicyclic intermediates from piperazic acid or an ester thereof useful in the manufacture of caspase inhibitors
申请人:Vertex Pharmaceuticals, Incorporated
公开号:US06703500B2
公开(公告)日:2004-03-09
The invention relates to a process for synthesizing piperazic acid and similar, ring-containing acids. The invention also relates to a process for simultaneously N(2)-acylating piperazic acid or an ester thereof and forming a bicyclic ring structure. The invention also relates to the use of either or both processes in a method of synthesizing a bicyclic compound useful as an intermediate for the production of an inhibitor of a caspase, particularly an inhibitor of interleukin-1&bgr; converting enzyme (“ICE”).
efficient method for α-brominating lactones that affords α-bromolactones under mild conditions using tetraalkylammonium hydroxide (R4N+OH−) as a base was developed. Lactones are ring-opened with Br2 and a substoichiometric amount of PBr3, leading to good yields of the corresponding α-bromocarboxylic acids. Subsequent intramolecular cyclization over 1 h using a two-phase system (H2O/CHCl3) containing R4N+OH−
Derivatives of octahydro-6, 10-dioxo-6H-pyridazino [1,2-a] [1,2] diazepine-1-carboxylic acid, their preparation process and their use in the preparation of therapeutically active compounds
申请人:Aventis Pharma S.A.
公开号:US20030130269A1
公开(公告)日:2003-07-10
A compound of the formula
1
of SR configuration or a SR+SS wherein R is selected from the group consisting of hydrogen, alkyl of up to 18 carbon atoms and aryl and aralkyl of up to 18 carbon atoms and the —NH
2
is free or protected useful as intermediates.
Derivatives of octahydro-6,10-dioxo-6H-pyridazino [1,2-a] [1,2] diazepine-1-carboxylic acid, their preparation process and their use in the preparation of therapeutically active compounds
申请人:Aventis Pharma S.A.
公开号:US06570012B2
公开(公告)日:2003-05-27
Novel intermediates of the formulae
where the substituents are defined as in the specification.
小说中间体的公式,其中取代基的定义如规范中所述。
Process for the preparation of bicyclic compounds and the use of this process for the preparation of an ice inhibitor compound
申请人:Aventis Pharma S.A.
公开号:US06512111B1
公开(公告)日:2003-01-28
A method for preparing compounds of formula (I)
wherein R is selected from the group consisting of H. alkyl, aryl, and aralkyl of up to 18 carbon atoms and the amine function may be free or protected from a compound of formula (IA) wherein cyclization is carried out in a basic medium and in the presence of a phosphonic acid derivative and the use of said method as an intermediate step for preparing a compound inhibiting the interleukin-1 beta conversion enzyme.