1151665-75-6

Upstream product

• 1132659-94-9 (3R,4S,5R)-3,4,5-tris-methanesulfonyloxy-cyclohex-1-enecarboxylic acid ethyl ester 
• 1350928-95-8 ethyl (3S,4R,5R)-3-azido-4,5-dihydroxycyclohex-1-ene-1-carboxylate 
• 124-63-0 methanesulfonyl chloride 
• 101769-63-5 (3R,4S,5R)-3,4,5-trihydroxycyclohex-1-ene-1-carboxylic acid ethyl ester 
• 138-59-0 shikimic acid 

Downstream Products

• 204255-11-8 oseltamivir phosphate 
• 196618-13-0 oseltamivir 
• 1132659-98-3 (3R,4S,5R)-4-amino-3-(1-ethyl-propoxy)-5-methanesulfonyloxy-cyclohex-1-enecarboxylic acid ethyl ester 
• 582-33-2 3-aminobenzoic acid ethyl ester 
• 1132659-97-2 (3R,4S,5R)-4-[(diethoxyphosphoryl)amino]-3-(1-ethylpropoxy)-5-(methanesulfonyloxy)cyclohex-1-enecarboxylic acid ethyl ester 
• 1132659-99-4 (3R,4S,5R)-4-acetylamino-3-(1-ethyl-propoxy)-5-methanesulfonyloxy-cyclohex-1-enecarboxylic acid ethyl ester 
• 204255-06-1 oseltamivir 
• 1609930-38-2 methyl (1S,4aR,5S,8aS)-5-{2-[2-(1-hydroxy-2-{1-[3-(ethoxycarbonyl)phenyl]-1H-triazol-4-yl}ethyl)furan-3-yl]ethyl}-1,4a-dimethyl-6-methylidenedecahydronaphthalene-1-carboxylate 
• 1609930-41-7 methyl (1S,4aR,5S,8aR)-5-{2-[2-(2-[1-(3-ethoxycarbonylphenyl)-1H-triazol-4-yl]-1-[1-(3-ethoxycarbonylphenyl)-1H-1,2,3-triazol-4-yl]methoxyethyl)furan-3-yl]ethyl}-1,4a-dimethyl-6-methylidenedecahydronaphthalene-1-carboxylate 
• 1191921-01-3 (3R,4R,5S)-4-acetylamino-5-acetylamino-3-(1-ethylpropoxy)-1-cyclohexene-1-carboxylic acid ethyl ester 

Relevant academic research and scientific papers

Safe and highly efficient adaptation of potentially explosive azide chemistry involved in the synthesis of Tamiflu using continuous-flow technology

Tamiflu is one of the most effective anti-influenza drugs, which is currently manufactured by Hoffmann-La Roche from shikimic acid. Owing to its importance, more than 60 synthetic routes have been developed to date, however, most of the synthetic routes u

Continuous-Flow Synthesis of (-)-Oseltamivir Phosphate (Tamiflu)

Herein the anti-influenza drug (-)-oseltamivir phosphate is prepared in continuous flow from ethyl shikimate with 54% overall yield over nine steps and total residence time of 3.5 min from the individual steps. Although the procedure involved intermediate

Method for preparing oseltamivir phosphate by azide process

The invention belongs to the field of pharmaceutical chemicals, and particularly relates to a method for preparing oseltamivir phosphate by an azide process. The method comprises the following steps:reacting a compound shown in a formula (III) with sodium azide and ammonium chloride, opening a nitrogen heterocyclic ring, performing acetylation, reducing an azide group, removing tert-butyl, salifying with phosphoric acid, and purifying to obtain pure oseltamivir phosphate shown in a formula (I). According to the method, diallylamine with strong corrosivity and expensive palladium acetate do not need to be used so that the enterprise cost is reduced.

FLOW SYNTHESIS PROCESS FOR THE PRODUCTION OF OSELTAMIVIR

This invention provides for a flow synthesis process for producing Oseltamivir and pharmaceutically acceptable salts thereof from shikimic acid in particular but not exclusively to a flow synthesis process for producing Oseltamivir phosphate from shikimic acid in a nine-step flow synthesis that provides for superior reaction times and product yields compared to known methods.

The hydrophobic side chain of oseltamivir influences type A subtype selectivity of neuraminidase inhibitors

Neuraminidase, which plays a critical role in the influenza virus life cycle, is a target for new therapeutic agents. The study of structure–activity relationships revealed that the C-5 position amino group of oseltamivir was pointed to 150-cavity of the neuraminidase in group 1. This cavity is important for selectivity of inhibitors against N1 versus N2 NA. A serial of influenza neuraminidase inhibitors with the oseltamivir scaffold containing lipophilic side chains at the C-5 position have been synthesized and evaluated for their influenza neuraminidase inhibitory activity and selectivity. The results indicated that compound 13o (H5N1 IC50?=?0.1?±?0.04?μm, H3N2 IC50?=?0.26?±?0.18?μm) showed better inhibitory activity and selectivity against the group 1 neuraminidase. This study may provide a clue to design of better group 1 neuraminidase inhibitors.

Oseltamivir analogues bearing N-substituted guanidines as potent neuraminidase inhibitors

A series of oseltamivir analogues bearing an N-substituted guanidine unit were prepared and evaluated as inhibitors of neuraminidases from four strains of influenza the two most potent analogues identified contain relatively small N-guanidine substituents (N-methyl and N-hydroxyl) and display enhanced inhibition with IC50 values in the low nanomolar range against neuraminidases from wild-type and oseltamivir-resistant strains. Potential advantages of including the N-hydroxyguanidine moiety in neuraminidase inhibitors are also discussed.

Facile method for the synthesis of oseltamivir phosphate

A ten-step scheme for the preparation of an antiviral agent, ethyl (3R,4R,5S)-4-acetylamino-5-amino-3-(pent-3-yloxy)cyclohex-1-enecarboxylate phosphate, from (-)-shikimic acid was studied. The main parameters of the synthesis were determined and the optimal conditions for the preparation of the intermediate compounds were selected. The total yield of oseltamivir phosphate calculated based on (-)-shikimic acid was 27%.

Synthesis of oseltamivir and tamiphosphor from N-acetyl-d-glucosamine

Using N-acetyl-d-glucosamine as a starting material, the anti-influenza drugs oseltamivir and tamiphosphor were synthesized via a pivotal intermediate of aldehyde 8. An intramolecular Horner-Wadsworth-Emmons reaction was utilized to construct the highly f

A short and practical synthesis of oseltamivir phosphate (tamiflu) from (-)-shikimic acid

(Chemical Equation Presented) Oseltamivir phosphate (1) was synthesized from (-)-shikimic acid through a short and practical synthetic route via eight steps in 47% overall yield. In addition, the highly regioselective and stereoselective nucleophilic replacement of OMs by the N3 group in the third and seventh steps has been studied in detail, and the reaction conditions were optimized.

Preparation of oseltamivir phosphate

The invention provides a new process for the conversion of shikimic acid to oseltamivir (I), and optionally to an acid addition salt, via the intermediate phosphoramide VII.