The present invention relates to a process for the preparation of 2-(benzhydrylthio)acetamide (II), key intermediate for the synthesis of modafinil, by reaction of benzhydryl chloride with thiourea and chloroacetamide.
Electron transfer in the peroxytrifluoroacetic acid-assisted sulfoxidation and oxidative destruction of benzhydryl sulfides
作者:A. R. Akopova、A. S. Morkovnik、V. N. Khrustalev、A. V. Bicherov
DOI:10.1007/s11172-013-0159-1
日期:2013.5
The reactions of benzhydryl sulfides Ph2CHSCH2R (R = H, CONH2, COOH, CN) with peroxytrifluoroacetic acid in CF3COOH were studied experimentally and by the quantum chemical density functional theory (DFT) method and exhibited an unusual dependence on the substituent R. When R≠H, a complicated oxidative destruction of the substrates occurs to form 2,4,6-tribenzhydrylphenol as one of the products, while
通过实验和量子化学密度泛函理论 (DFT) 方法研究了二苯甲基硫化物 Ph2CHSCH2R (R = H, CONH2, COOH, CN) 与过氧三氟乙酸在 CF3COOH 中的反应,并表现出对取代基 R 的异常依赖性。 当 R≠ H,底物发生复杂的氧化破坏,形成 2,4,6-三二苯甲基苯酚作为产物之一,而在 R = H 的情况下,起始二苯甲基硫化物被顺利亚氧化。这一事实是由于在初始步骤中从底物到试剂的共同电子转移以及随后形成的物种转化的差异。
New benzhydrysulphinyl derivatives
申请人:Laboratoire L. Lafon
公开号:US04066686A1
公开(公告)日:1978-01-03
The invention provides the benzhydrylsulphinyl derivatives of the formula: (C.sub.6 H.sub.5).sub.2 CH--SO--(CH.sub.2).sub.n --R I where n is 1, 2 or 3 and R is C(.dbd.O)NHOH, C(.dbd.NH)NH.sub.2, C(.dbd.NH)NHOH, 2-.DELTA..sup.2 -imidazolinyl or NR.sub.1 R.sub.2 (where R.sub.1 is H or C.sub.1 -C.sub.3 -alkyl and R.sub.2 is H, C.sub.1 -C.sub.3 -alkyl, or CH.sub.2 CH.sub.2 OH, and R.sub.1 and R.sub.2 considered together can form, with the nitrogen atom to which they are bonded, a N-heterocyclic group of 5 to 7 ring members, which can be substituted and can contain a second hetero-atom such as O and N), and their addition salts. These products are useful in therapy for treating disturbances of the central nervous system.
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.
[EN] PROCESS FOR ENANTIOSELECTIVE SYNTHESIS OF SINGLE ENANTIOMERS OF MODAFINIL BY ASYMMETRIC OXIDATION<br/>[FR] PROCEDE DE SYNTHESE ENANTIO-SELECTIVE D'ENANTIOMERES UNIQUES DE MODAFINIL PAR OXYDATION ASYMETRIQUE
申请人:CEPHALON FRANCE
公开号:WO2005028428A1
公开(公告)日:2005-03-31
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, R1, R1a, R2 and R2a are as defined in claim 1.