Details for Patent: 7,842,687

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Summary for Patent: 7,842,687

Title:	Cephalotaxane derivatives and their processes of preparation and purification
Abstract:	The present invention concerns a new general process for asymmetric hemisynthesis of harringtonines and their analogs, that are alkaloids used in chemotherapy. This process comprises direct esterification of a natural cephalotaxine with an acylating compound constituted of a side chain precursor which backbone and functionalization are entirely preformed. The invention also concerns a natural, synthetic or semi-synthetic harringtonines including their tautomeric forms and their salts of the following formula: ##STR00001## wherein n=2 (i.e. harringtonine) or n=3 (i.e. homoharringtonine), in which the total content of impurities, possibly including enantiomeric forms, is lower than 1%, and/or the content of the major impurity is lower than 0.9%, and/or the chromatographic assay exhibits a harringtonines content higher than 97.5%.
Inventor(s):	Robin; Jean-Pierre (Nyon, CH), Blanchard; Julie (Rouillon, FR), Marie; Jean-Pierre (Sevres, FR), Radosevic; Nina (Nyon, CH)
Assignee:	Chemgenex Pharmaceuticals, Inc. (Geelong, Victoria, AU)
Application Number:	11/440,648
Patent Claim Types: see list of patent claims	Compound; Composition; Use;

Drugs Protected by US Patent 7,842,687

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Applicant	Tradename	Generic Name	Dosage	NDA	Approval Date	TE	Type	RLD	RS	Patent No.	Patent Expiration	Product	Substance	Delist Req.	Patented / Exclusive Use	Submissiondate
>Applicant	>Tradename	>Generic Name	>Dosage	>NDA	>Approval Date	>TE	>Type	>RLD	>RS	>Patent No.	>Patent Expiration	>Product	>Substance	>Delist Req.	>Patented / Exclusive Use	>Submissiondate

Foreign Priority and PCT Information for Patent: 7,842,687

Foriegn Application Priority Data
Foreign Country	Foreign Patent Number	Foreign Patent Date
France	98 03492	Mar 20, 1998

International Family Members for US Patent 7,842,687

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Country	Patent Number	Estimated Expiration	Supplementary Protection Certificate	SPC Country	SPC Expiration
Austria	289312	⤷ Sign Up
Australia	2002304338	⤷ Sign Up
Australia	3270699	⤷ Sign Up
Canada	2324895	⤷ Sign Up
Canada	2441428	⤷ Sign Up
>Country	>Patent Number	>Estimated Expiration	>Supplementary Protection Certificate	>SPC Country	>SPC Expiration

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