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US3825541A Expired / Lapsed US ⏱️ 0.0 years remaining

(+-)-9-(beta-(3-alpha-amino-2alpha-hydroxy)cyclopentyl)-6-substituted-purines and derivatives thereof

Assignee: University of Minnesota Twin Cities
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Filing: 1972-01-26
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Granted: 1974-07-23
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Expires: 1992-01-26
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Abstract

Abstract A NEW CLASS OF CHEMICAL COMPOUNDS, ($)-9-(B(3AAMINO-2A-HYDROXY)CYCLOPENTYL) - 6 - SUBSTITUTED - PURINES HAVING THE GENERAL FORMULA: 6-R,9-(2-(HO-),3-X-CYCLOPENTYL)-9H-PURINE WHEREIN R IS A SUBSTITUENT SELECTED FROM THE GROUP CONSISTING OF HYDROXYL, MERCAPTO, METHYL MERCAPTO, HALOGEN (CHLORINE, BROMINE, FLUORINE AND IODINE) AND SUBSTITUTED AMONO: R''-N(-R")- WHEREIN R'' AND R'''' MAY BE THE SAME OR DIFFERENT SUBSTITUENTS AND ARE SELECTED FROM THE GROUP CONSISTING OF HYDROGEN, METHYL, ETHYL, PROPYL AND PHENYL; X IS AN AMINO RADICALOR AMINO ACID; AND ACID SALT DERIVATIVES OF THE SAME, SUCH AS ACETIC, HYDROCHLORIC, SULFURIC, ETC.; AND THE METHOD OF PREPARATION THEREOF. THE INTERMEDIATE ($)-9(B-(3A-AMINO - 2A - HYDROXY)CYCLOPENTYL) - 6 - DIMETHYLAMINOPURINE, OR ANY OF ITS CORRESPONDING 6-SUBSTITUTED DERIVATIVES, LEADS TO THE PREPARATION OF TWO DIASTERIOISOMERS WHEN CONDENSED WITH THE APPROPRIATELY BLOCKED LAMINO ACID. THE SEPARATION OF THESE DIASTERIOISOMERS RESULTS IN THE ISOLATION OF ANTIMICROBIAL AND ANTITUMOR AGENTS.

Inventors

  • 👤 R Vince

Bibliographic Details

Application Number —
Jurisdiction US
Data Source google_patents
Last Synchronized 2026-10-27 09:24
CPC Classifications
C; C07; C07D; C07D317/00; C07D317/08; C07D317/72; C07D473/00

Claims Analysis

Total Claims: 0
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References Cited (Backward Citations)

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USPTO Annuity & Maintenance Windows

Annuity Stage Window Opens Payment Deadline Surcharge Period Until Estimated Fee Status
3.5 Years (Year 4) 1977-07-22 1978-01-21 1978-07-23 $2000.00 Window Closed / Lapsed
7.5 Years (Year 8) 1981-07-22 1982-01-21 1982-07-23 $3760.00 Window Closed / Lapsed
11.5 Years (Year 12) 1985-07-22 1986-01-21 1986-07-23 $7700.00 Window Closed / Lapsed

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