- Aliskiren intermediate preparation method
-
The present invention relates to the technical field of pharmaceutical preparation method, the preparation method of the existing long reaction time, the problem of low yield, provides a aliskiren preparation method, comprises the following steps: S1, 1st intermediate preparation: the raw material is dissolved in a solvent, adding sodium hypochlorite and sodium bisulfite reaction, shall be 1st intermediate; S2, intermediate in the preparation of 2nd: to the 1st intermediate dropping 4 - bromo - 1 - methoxy - 2 - (3 - methoxy third oxygen radical) benzene, tetrahydrofuran solution, adding low [...] catalyst, to obtain the 2nd intermediate; S3, aliskiren intermediate preparation: will be soluble in ethyl acetate in the 2nd intermediate, then adding water, nitrogen replacement 3 times, the hydrogen replaced 3 times after adding the hydrogen hydrogenation reaction, to obtain the product. By adding low deuterium water as a catalyst, help to accelerate the step S2 of the reaction rate, the reaction time is shortened, while at the same time help to improve the step S2 in the reaction yield, and then make the total reaction yield can be improved.
- -
-
Paragraph 0040; 0055-0060; 0061; 0072-0076; 0087-0090
(2019/03/25)
-
- Convergent Synthesis of the Renin Inhibitor Aliskiren Based on C5-C6 Disconnection and CO2H-NH2 Equivalence
-
A novel synthesis of the renin inhibitor aliskiren based on an unprecedented disconnection between C5 and C6 was developed, in which the C5 carbon acts as a nucleophile and the amino group is introduced by a Curtius rearrangement, which follows a simultaneous stereocontrolled generation of the C4 and C5 stereogenic centers by an asymmetric hydrogenation. Operational simplicity, step economy, and a good overall yield makes this synthesis amenable to manufacture on scale.
- Cini, Elena,Banfi, Luca,Barreca, Giuseppe,Carcone, Luca,Malpezzi, Luciana,Manetti, Fabrizio,Marras, Giovanni,Rasparini, Marcello,Riva, Renata,Roseblade, Stephen,Russo, Adele,Taddei, Maurizio,Vitale, Romina,Zanotti-Gerosa, Antonio
-
p. 270 - 283
(2016/03/04)
-
- A stereoselective catalytic nitroaldol reaction as the key step in a strategy for the synthesis of the renin inhibitor aliskiren
-
Aliskiren is the first-in-class orally active direct renin inhibitor. It was approved in 2007 for the treatment of hypertension. We have designed a new strategy for the convergent synthesis of aliskiren that involves a catalytic stereoselective nitroaldol reaction as the key step. A new enantiopure nitroalkane (synthon A1), prepared in only three steps from a commercially available enantiopure 2-(arylmethyl)-3-methyl butanol derivative, was successfully used in a copper-catalysed Henry reaction to give a nitrolactone intermediate in which the correct configuration for the final product was established at all four stereocentres. Nitro-group reduction, Boc-protection of the resulting amine, aminolysis of the lactone with 3-amino-2,2-dimethylpropionamide, and finally Boc-deprotection led to the enantiopure renin inhibitor aliskiren.
- Rossi, Sergio,Benaglia, Maurizio,Porta, Riccardo,Cotarca, Livius,Maragni, Paolo,Verzini, Massimo
-
p. 2531 - 2537
(2015/04/22)
-
- PROCESS FOR PREPARING 8-ARYLOCTANOIC ACIDS
-
The present invention relates to a process for preparing aliskiren and, more particularly, to an improved method for synthesizing a β-amino alcohol or a lactone analog thereof via the corresponding nitro derivatives of formula (Ia) or (Ib) these intermediates being used in the preparation of aliskiren.
- -
-
-
- PROCESS FOR THE PREPARATION OF ALISKIREN
-
The present invention provides a novel process and novel intermediates useful in the synthesis of pharmaceutically active compounds, especially renin inhibitors, such as Aliskiren, or a salt thereof, preferably Aliskiren hemifumarate.
- -
-
Paragraph 0055; 0056
(2014/09/29)
-
- Process for Producing Aliskiren
-
A new route of synthesis of the compound Aliskiren of formula (I), used in the treatment of hypertension, is described.
- -
-
Paragraph 0211-0212
(2013/03/28)
-
- METHOD FOR PREPARING ALISKIREN AND ITS INTERMEDIATES THEREOF
-
A method for preparing Aliskiren and intermediate thereof, which comprises the following steps: reacting 4-bromo-1-methoxy-2-(3-methoxypropoxy)benzene with magnesium isopropyl chloride and n-BuLi to obtain the compound of formula XXII; reacting the product of methylsulfonylation of the compound of formula XIX with anhydrous LiBr to obtain the compound of formula XXI; obtaining the intermediate of Aliskiren shown as formula XV by reacting the compound of formula XXII with the compound of formula XXI in an ether as the solvent and in the presence of a catalyst containing iron; then reacting the compound of formula XV with the compound of formula VII to obtain the compound of formula XXIII, following removing R1 from the amino group and obtaining Aliskiren shown as formula I.
- -
-
Paragraph 0037; 0038; 0039
(2013/09/12)
-
- PROCESS FOR THE PREPARATION OF ALISKIREN
-
The present invention provides a novel process and novel intermediates useful in the synthesis of pharmaceutically active compounds, especially renin inhibitors, such as Aliskiren, or a salt thereof, preferably Aliskiren hemifumarate.
- -
-
-
- METHOD FOR PREPARING ALISKIREN AND INTERMEDIATE THEREOF
-
A method for preparing Aliskiren and intermediate thereof, which comprises the following steps: reacting 4-bromo-1-methoxy-2-(3-methoxypropoxy)benzene with magnesium isopropyl chloride and n-BuLi to obtain the compound of formula XXII; reacting the product of methylsulfonylation of the compound of formula XIX with anhydrous LiBr to obtain the compound of formula XXI; obtaining the intermediate of Aliskiren shown as formula XV by reacting the compound of formula XXII with the compound of formula XXI in an ether as the solvent and in the presence of a catalyst containing iron; then reacting the compound of formula XV with the compound of formula VII to obtain the compound of formula XXIII, following removing R1 from the amino group and obtaining Aliskiren shown as formula I.
- -
-
-
- Manufacturing process for 8-aryloctanoic acids such as Aliskiren
-
The present invention relates to a novel manufacturing process and novel intermediates useful in the synthesis of pharmaceutically active compound such as Aliskiren. The invention describes preparation of enantiomerically pure 8-aryloctanoic acid of formu
- -
-
-
- PROCESS FOR PRODUCING ALISKIREN
-
A new route of synthesis of the compound Aliskiren of formula (I), used in the treatment of hypertension, is described.
- -
-
-
- Process for enantiomerically pure 8-Aryloctanoic acids as Aliskiren
-
The present invention relates to a novel manufacturing process and novel intermediates useful in the synthesis of pharmaceutically active compounds, especially rennin inhibitors such as Aliskiren. The invention describes a preparation of enantiomerically pure 8-aryloctanoic acids of general formula I from readily available key intermediate, chiral cis-diacid of formula II, aziridine of formula XI and a monocyclic compound of formula III.
- -
-
-
- Manufacturing process for enantiomerically pure 8-Aryloctanoic acids as Aliskiren
-
The invention describes a novel technical process and novel intermediates useful for the manufacture of enantiomerically pure 8-aryloctanoic acids of the formula I which are pharmaceutically active compounds as rennin inhibitors.
- -
-
-
- Process for the manufacture of enantiomerically pure aryloctanoic acids as aliskiren
-
The present invention relates to a novel manufacturing process and novel intermediates useful in the synthesis of pharmaceutically active compounds, especially rennin inhibitors such as Aliskiren. The invention describes a preparation of enantiomerically pure 8-aryloctanoic acids of general formula I from readily available key intermediate, a novel bicyclic compound of formula IV.
- -
-
-
- NEW METHODS
-
The invention related to a novel process, novel process steps and novel intermediates useful in the synthesis of pharmaceutically active compounds, especially renin inhibitors, such as Aliskiren. Inter alia, the invention relates to a process for the manufacture of a compound of the formula (I) or a salt thereof, wherein R1 as well as Act are as defined in the specification, and processes of manufacturing this compound as well as intermediates in this process.
- -
-
Page/Page column 67-68
(2008/12/04)
-
- ORGANIC COMPOUNDS
-
The invention related to a novel process, novel process steps and novel intermediates useful in the synthesis of pharmaceutically active compounds, especially renin inhibitors, such as Aliskiren. Inter alia, the invention relates to a process for the manufacture of a compound of the formula II, or a salt thereof, and a compound of formula Vl or a salt thereof, wherein R3 and R4 as well as Act are as defined in the specification, and processes of manufacturing these. Additionally transformation of compounds (Vl) with metallo organic compounds (VII) give rise to the new compounds (VMI) which are direct precursors for the preparation of Aliskiren.
- -
-
Page/Page column 78
(2010/11/27)
-
- SYTHESIS OF RENIN INHIBITORS INVOLVING A CYCLOADDITION REACTION
-
The invention related to a novel process, novel process steps and novel intermediates useful in the synthesis of pharmaceutically active compounds, especially renin inhibitors, such as Aliskiren. Inter alia, the invention relates to a process for the manufacture of a compound of the formula (III), wherein R, R1, and R' are as defined in the specification, or a salt thereof, and a compound of formula (IV) wherein R, R1, R2 and R' are as defined in the specification, and processes of manufacturing these.
- -
-
Page/Page column 60
(2010/11/26)
-
- Formal total synthesis of the potent renin inhibitor aliskiren: Application of a SmI2-promoted acyl-like radical coupling
-
A formal total synthesis of the potent renin inhibitor aliskiren is disclosed exploiting an alternative coupling strategy recently developed by this laboratory for the preparation of the hydroxyethylene isostere-based class of protease inhibitors. The thi
- Lindsay, Karl B.,Skrydstrup, Troels
-
p. 4766 - 4777
(2007/10/03)
-
- ALTERNATIVE SYNTHESIS OF RENIN INHIBITORS AND INTERMEDIATES THEREOF
-
The present invention relates to synthetic routes to prepare a compound of the formula (A); wherein R1 is halogen, C1-6 halogenalkyl, C1-6 alkoxy-C1-6 alcoxy or C1-6alkoxy-C1-6alkyl; R2 is halogen, C1-4alkyl or C1-4alkoxy; R3 and R4 are independently branched C3-6alkyl; and R5 is cycloalkyl, C1-6alkyl, C1-6hydroxyalkyl, Cl-6alkoxy-C 1-6alkyl, C1-6alkanoyloxy-C1-6alkyl, C1-6aminoalkyl, C1-6alkylamino-C 1-6alkyl, Cl-6dialkylamino-C1-6alkyl, C1-6alkanoylamino- C1-6alkyl, HO(O)C-Cl-6alkyl, C1-6alkyl-O-(O)C-C1-6alkyl, H2N-C(O)-Cl-6alkyl, C1-6alkyl-HN-C(O)-C1-6alkyl or (C1-6alkyl)2N-C(O)-C1-6alkyl; or a pharmaceutically acceptable salt thereof as well as key intermediates obtained when following these routes as well as their preparation.
- -
-
Page/Page column 57; 58
(2010/10/20)
-
- Practical synthesis of an orally active renin inhibitor aliskiren
-
A convergent synthesis of aliskiren was accomplished via the use of Segment AB as the key intermediate, which was prepared via the coupling of the Grignard reagent derived from Segment B with Segment A, followed by subsequent oxidative lactonization.
- Dong, Hua,Zhang, Zhi-Liu,Huang, Jia-Hui,Ma, Rujian,Chen, Shu-Hui,Li, Ge
-
p. 6337 - 6340
(2007/10/03)
-