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US3717628A Expired / Lapsed US ⏱️ 0.0 years remaining

Method for the preparation of 2,3-dimethyl aziridine

Assignee: United States Department of the Air Force
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Filing: 1970-10-09
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Granted: 1973-02-20
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Expires: 1990-10-09
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Abstract

Abstract THIS INVENTION INVOLVES THE SYNTHESIS OF 2,3-DIMETHYL AZIRIDINE IN BOTH ITS CIS AND TRANS ISOMERIC FORMS. SYNTHESIS IS EFFECTED BY TREATING THE APPROPRIATE ISOMERIC FORM OF 2-BUTENE. TREATMENT IS CARRIED OUT BY A FOUR STEP PROCESS RESULTING IN THE FORMATION OF THE CORRESPONDING CIS-2,3DIMETHYL AZIRIDINE COMPOUND OR THE TRANS-2,3-DIMETHYL AZIRIDINE COMPOUND. IN THE FIRST STEP OF THE PROCESS, 2-BUTENE IS EPOXIDIZED WITH PERACETIC ACID. THE RESULTING EPOXIDE IS THEN CONVERTED TO AN AMINO ALCOHOL BY TREATMENT WITH AMMONIA. IN THE THIRD STEP, AN INNER SALT IS FORMED BY REACTING THE AMINO ALCOHOL WITH CHLOROSULFONIC ACID. FINALLY, THE INNER SALT IS TREATED WITH SODIUM HYDROXIDE TO PRODUCE THE AZIRIDINE COMPOUND OF THIS INVENTION.

Inventors

  • 👤 C Rowe
  • 👤 E Stogryn

Bibliographic Details

Application Number —
Jurisdiction US
Data Source google_patents
Last Synchronized 2026-11-08 19:02
CPC Classifications
C; C07; C07D; C07D203/00; C07D203/04; C07D203/06; C07D203/08

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) 1976-02-20 1976-08-21 1977-02-20 $2000.00 Window Closed / Lapsed
7.5 Years (Year 8) 1980-02-20 1980-08-21 1981-02-20 $3760.00 Window Closed / Lapsed
11.5 Years (Year 12) 1984-02-20 1984-08-21 1985-02-20 $7700.00 Window Closed / Lapsed

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