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US5354937A Expired / Lapsed US ⏱️ 0.0 years remaining

2-tert-amyl compounds

Assignee: BASF SE
•
Filing: 1993-09-30
•
Granted: 1994-10-11
•
Expires: 2013-09-30
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Abstract

Abstract Tert-amyl compounds of the general formula I ##STR1## and novel processes for preparing 2-tert-amylbutadiene by dehydrating 3,4,4-trimethylhex-1-en-3-ol at from 100° to 350° C. and from 0.01 to 50 bar on acidic catalysts, its preparation by partially hydrogenating 3,4,4-trimethyl-hex-1-yn-03-ol at from 0° to 50° C. and from 0.01 to 50 bar and its preparation by reacting tert-amyl methyl ketone (3,3-dimethylpentan-2-one) with acetylene in the presence of basic catalysts at from 0° to 60° C. and from 0.01 to 50 bar, and also the preparation of 2-tert-amylanthraquinone by reacting 2-tert-amylbutadiene with 1,4-naphthoquinone at from 20° to 200° C. and from 0.01 to 50 bar to give 2-tert-amyl-1,4,4a,9a-tetrahydroanthraquinone and then oxidizing the latter in the presence of a strong base at from 0° to 50° C. are described.

Inventors

  • 👤 Klaus Ebel
  • 👤 Juergen Schroeder

Bibliographic Details

Application Number —
Jurisdiction US
Data Source google_patents
Last Synchronized 2026-11-02 21:45
CPC Classifications
C; C07; C07C; C07C33/00; C07C33/04; C07C33/042; C07C11/00; C07C11/12; C07C33/02; C07C33/025; C07C33/03; C07C49/00; C07C49/587; C07C49/657; C07C49/665; C07C49/675; C07C2603/00; C07C2603/02; C07C2603/04; C07C2603/22; C07C2603/24

Claims Analysis

Total Claims: 2
Claim 1
Independent Claim 11 words
A tert-amyl compound of formula I ##STR3## where R is ##STR4##
Claim 2
Dependent Claim 11 words
A tert-amyl compound of formula I ##STR3## where R is ##STR4##

References Cited (Backward Citations)

FR946980A Cited
DE2013299A1 Cited
DE2460922A1 Cited
DE2720294A1 Cited
US4087458A Cited
US4347388A Cited
EP0248423A1 Cited
US4895984A Cited

USPTO Annuity & Maintenance Windows

Annuity Stage Window Opens Payment Deadline Surcharge Period Until Estimated Fee Status
3.5 Years (Year 4) 1997-10-10 1998-04-11 1998-10-11 $2000.00 Window Closed / Lapsed
7.5 Years (Year 8) 2001-10-10 2002-04-11 2002-10-11 $3760.00 Window Closed / Lapsed
11.5 Years (Year 12) 2005-10-10 2006-04-11 2006-10-11 $7700.00 Window Closed / Lapsed

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