Intermediates for benzopyran prostaglandin derivatives
CA 1215994 A · Owner: Upjohn Company (The) · Inventors: Aristoff, Paul A.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Intermediate compounds for preparing benzopyran prostaglandin derivatives of general formula: (XIII), or, (XIX), wherein Y is -CH2CH2 cis-CH=CH-, trans-CH=CH- or -C?C-;, R1 is =O H:H, .alpha.-OR12:.beta.-H, .alpha.-H:.beta.-OR12 .alpha.-CH2OR12:.beta.-H or, .alpha.-H:.beta.-CH2OR12 wherein R12 is H or an -OH-protecting, group; M is .alpha.-OR12:.beta.-R14 or .alpha.-R14:.beta.-OR12 wherein R12, is as defined above and R14 is H or -CH3; L1 is .alpha.-R15:.beta.-R16 .alpha.-R16:.beta.-R15 or a mixture thereof wherein R15 and R16, independently, are H F or -CH3, with the proviso that, one of R15 and R16 is F only when the other is not -CH3; R17 is , ; , when taken together, is, (i) (ii) …
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Listed from its CIPO record in Patent Yard's archive of Canadian patents past their term. Its claims, description and drawings are in the CIPO record and on Google Patents, and the Claude kit works from them.
Why it's free to use
- Granted December 30, 1986. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended December 30, 2003.
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Everything on this page comes from the CIPO record linked above. Contains information licensed under the Open Government Licence – Canada.