[EN] PROCESS FOR PREPARING CLOBAZAM USING NOVEL INTERMEDIATES<br/>[FR] PROCÉDÉ DE PRÉPARATION DE CLOBAZAM À L'AIDE DE NOUVEAUX INTERMÉDIAIRES
申请人:AMNEAL PHARMACEUTICALS COMPANY GMBH
公开号:WO2016193482A1
公开(公告)日:2016-12-08
Processes for preparation of 7-chloro-1-methyl-5-phenyl-1,5-dihydro- benzo[b][1,4]diazepine-2,4-dione (Clobazam) are provided. The present invention also relates to the novel intermediates and its use in preparation of clobazam.
[EN] PROCESS FOR THE PREPARATION OF ALOGLIPTIN<br/>[FR] PROCÉDÉ DE PRÉPARATION D'ALOGLIPTINE
申请人:MAPI PHARMA HK LTD
公开号:WO2010109468A1
公开(公告)日:2010-09-30
The present invention is based on the discovery of a process for preparing pyrimidin- dione compounds, especially alogliptin and its derivatives, which comprises the reaction of a urea derivative of formula (VIII) with a malonic acid or its derivatives to form intermediates of formulae (VII) or (VII-A), which are subsequently converted to a compound of formula (II) upon introduction of a leaving group X. Compound (II) then reacts with an amine to form compound (I), which is optionally converted to its salts of formula (IV).
Synthesis of the reported structure of crassiflorone, a naturally occurring quinone isolated from the African ebony Diospyros crassiflora, and regioisomeric pentacyclic furocoumarin naphthoquinones
作者:Jalindar Padwal、William Lewis、Christopher J. Moody
DOI:10.1039/c0ob01231a
日期:——
The key steps are a Diels–Alder reaction to form 2-bromo-8-hydroxy-6-methylnaphthoquinone, followed by O-protection and copper(II) mediated coupling to 4-hydroxy-5-methylcoumarin to establish the pentacyclic framework whose structure was unambiguously confirmed by X-ray crystallography. Since the spectroscopic data of the synthetic material did not match those reported for the natural product, three
Gaining Insight Into Reactivity Differences Between Malonic Acid Half Thioesters (MAHT) and Malonic Acid Half Oxyesters (MAHO)
作者:Sean P. Bew、G. Richard Stephenson、Jacques Rouden、Jeremy Godemert、Haseena Seylani、Luis A. Martinez-Lozano
DOI:10.1002/chem.201605148
日期:2017.4.3
An efficient two‐step synthesis of structurally and functionally diverse thiophenol‐ and (cyclo)alkyl‐derived malonicacid half thioesters (MAHTs) and phenol‐derived malonicacid half oxyesters (MAHOs) has been achieved using cheap, readily available and easily handled starting materials. The synthesis of the MAHTs and MAHOs (the majority of which have not been previously reported) is readily scalable
Structure and efficiency in intramolecular and enzymic catalysis: intramolecular general base catalysis. Hydrolysis of monoaryl malonates
作者:Anthony J. Kirby、Gordon J. Lloyd
DOI:10.1039/p29760001753
日期:——
variation sufficient to produce enormous effects on reactivity in intramolecular nucleophilic catalysis, the efficiency of intramolecular general base catalysis changes by a factor of less than ten. Catalytic efficiency is also low in absolute terms, reaching a limiting effective concentration of ca. 100M, to be compared with 108M for intramolecular nucleophilic catalysis uncomplicated by strain. The difference