Abstract:
A process of producing atracurium besylate that substantially reduces the level of impurities in the final product and avoids the repeated use of ether is provided. In accordance with such a process, N,N'-4,10-dioxa-3,11-dioxotridecylene-1,13-bis-tetrahydropapaverine (Compound 1), methyl benzenesulfonate and a catalytic amount of an insoluble base in a solvent are combined to form a reaction mixture that is maintained for a period of time sufficient for atracurium besylate formation. The reaction mixture is then filtered to remove the insoluble base and the atracurium besylate is precipitated.
Abstract:
The present invention relates to a process for the synthesis of a compound having formula (I), from a compound of formula (II), which allows the synthesis to be carried out in a single reaction vessel and without column chromatography purification.
Abstract:
The present invention provides a process for the synthesis of Midazolam of formula (I) from a compound of formula (II), using thermodynamic, basic workup conditions. Additional steps to isolate the pure bulk product follow.
Abstract:
A process of producing atracurium besylate that substantially reduces the level of impurities in the final product and avoids the repeated use of ether is provided. In accordance with such a process, N,N'-4,10-dioxa-3,11-dioxotridecylene-1,13-bis-tetrahydropapaverine (Compound 1), methyl benzenesulfonate and a catalytic amount of an insoluble base in a solvent are combined to form a reaction mixture that is maintained for a period of time sufficient for atracurium besylate formation. The reaction mixture is then filtered to remove the insoluble base and the atracurium besylate is precipitated.
Abstract:
A process of producing atracurium besylate that substantially reduces the level of impurities in the final product and avoids the repeated use of ether is provided. In accordance with such a process, N,N'-4,10-dioxa-3,11-dioxotridecylene-1,13-bis-tetrahydropapaverine (Compound 1), methyl benzenesulfonate and a catalytic amount of an insoluble base in a solvent are combined to form a reaction mixture that is maintained for a period of time sufficient for atracurium besylate formation. The reaction mixture is then filtered to remove the insoluble base and the atracurium besylate is precipitated.
Abstract:
The present invention relates to a process for the synthesis of a compound having formula (I), from a compound of formula (II), which allows the synthesis to be carried out in a single reaction vessel and without column chromatography purification.