CA Patent

CA2710725C — Protected aldehydes for use as intermediates in chemical syntheses, and processes for their preparation

Assigned to Sandoz Inc · Expires 2017-08-01 · 9y expired

What this patent protects

A para-methoxy protected benzaldehyde useful in preparation of treprostinil, and of formula: (see formula 1) is prepared by subjecting to Claisen re-arrangement a substituted benzaldehyde of formula (Ia): (see formula Ia) to form the m-hydroxy-substituted benzaldehyde of formula …

USPTO Abstract

A para-methoxy protected benzaldehyde useful in preparation of treprostinil, and of formula: (see formula 1) is prepared by subjecting to Claisen re-arrangement a substituted benzaldehyde of formula (Ia): (see formula Ia) to form the m-hydroxy-substituted benzaldehyde of formula (Ib): see formula Ib) and then reacting compound (Ib) with a p-methoxybenzyl (PMB) compound to form a PMB-substituted benzaldehyde of formula 1

Drugs covered by this patent

Patent Metadata

Patent number
CA2710725C
Jurisdiction
CA
Classification
—
Expires
2017-08-01
Drug substance claim
No
Drug product claim
No
Assignee
Sandoz Inc
Source
FDA Orange Book + USPTO grounding via Google Patents

Bibliographic data sourced from FDA Orange Book + USPTO public records. Plain-English summary generated by AI grounded in source text. Patent term extensions (PTR, SPC, pediatric) may shift the effective expiry. Not legal advice.

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