Preparation of armodafinil crystalline Form I. Also provided is armodafinil having about 30% or more by weight of particles with sizes greater than about 250 μm, and about 70% or less by weight of particles having sizes less than about 250 μm, wherein of the particles having sizes less than about 250 μm, about 50% of them have diameters less than about 50 μm.
[EN] NOVEL CRYSTALLINE POLYMORPH OF ARMODAFINIL AND AN IMPROVED PROCESS FOR PREPARATION THEREOF<br/>[FR] NOUVEAU POLYMORPHE CRISTALLIN DE L'ARMODAFINIL ET PROCÉDÉ PERFECTIONNÉ PERMETTANT DE LE PRÉPARER
申请人:LUPIN LTD
公开号:WO2009090663A1
公开(公告)日:2009-07-23
The present invention relates to a novel crystalline polymorph of armodafinil. In another aspect the invention relates to an improved process for preparation of the novel polymorph of armodafinil.
本发明涉及一种新的脱氨腈晶型聚形体。另一方面,本发明涉及一种改进的制备该新聚形体的方法。
[EN] IMPROVED PROCESS FOR PREPARING BENZHYDRYLTHIOACETAMIDE<br/>[FR] PROCEDE AMELIORE PERMETTANT DE PREPARER UN BENZHYDRYLTHIOACETAMIDE
申请人:MALLINCKRODT INC
公开号:WO2005042479A1
公开(公告)日:2005-05-12
The present invention is directed to an improved process for preparing modafinil wherein benzhydrylthioacetate is prepared in high yield and purity by the reaction of a haloacetate with the reaction product of thiourea and benzhydrol. The reaction employing the haloacetate is conducted in a solvent comprising an organic solvent such as methanol having dissolved therein an organic base or an inorganic basic salt such as sodium bicarbonate. The resulting benzhydrylthioacetate can be amidated and then oxidized to provide the pharmaceutical grade modafinil in high yield and purity.
Novel method for preparing methyl 2-diphenylmethylsulfinylacetate
申请人:Organisation de Synthese Mondiale Orsymonde
公开号:EP1437345A1
公开(公告)日:2004-07-14
Method for preparing methyl 2-diphenylmethylsulfinylacetate (MDMSA) comprising the steps of :
(i) conversion of benzhydrol into methyldiphenylmethylthioacetate ; and
(ii) conversion of methyldiphenylmethylthioacetate into methyl-2-diphenylmethylsulfinylacetate by oxidation.
Process for enantioselective synthesis of single enantiomers of modafinil by asymmetric oxidation
申请人:Rebiere Francois
公开号:US20050222257A1
公开(公告)日:2005-10-06
The invention relates to a method for preparing a sulphoxide compound of formula (I) either as a single enantiomer or in an enantiomerically enriched form, comprising the steps of: a) contacting a pro-chiral sulphide of formula (II) with a metal chiral complex, a base and an oxidizing agent in an organic solvent; and optionally
b) isolating the obtained sulphoxide of formula (I).
wherein n, Y, R
1
, R
1a
, R
2
and R
2a
are as defined in claim
1.