← Back to Patent Explorer
US4124598A Expired / Lapsed US ⏱️ 0.0 years remaining

Psoralens

Assignee: Hoffmann La Roche Inc
•
Filing: 1976-10-20
•
Granted: 1978-11-07
•
Expires: 1996-10-20
📄 Original PDF 🌐 Google Patents 🔄 Sync Now

Abstract

Abstract New psoralen compounds have been synthesized. The compounds all include the addition of substituent groups at the 4' position on the basic trioxsalen structure. Specifically, the compounds have the structure: <IMAGE> wherein X may be any desired substituent such as halogenated alkyls, alcohols, ethers, aminoalkyls, etc. The new substituted psoralens exhibit high solubility in aqueous solution and low dissociation constants from deoxyribonucleic acid (DNA), as well as a reactivity with ribonucleic acids (RNA). Such psoralen compounds find use in the study of secondary structures of nucleic acids; as inhibitors of RNA replication; in the inactivation of viruses; and in the photo chemotherapy of psoriasis.

Inventors

  • 👤 John E. Hearst
  • 👤 Henry Rapoport
  • 👤 Stephen Isaacs
  • 👤 Che-Kun J. Shen

Bibliographic Details

Application Number —
Jurisdiction US
Data Source google_patents
Last Synchronized 2026-10-23 15:56
CPC Classifications
C; C07; C07D; C07D493/00; C07D493/02; C07D493/04; A; A61; A61P; A61P17/00; A61P27/00; A61P31/00; A61P31/12; A61P43/00; C07H; C07H21/00

Claims Analysis

Total Claims: 10
Claim 1
Independent Claim 37 words
A 4,5',8-trimethyl psoralen having an organic functional substituent on the 4' carbon atom said substituent being selected from the group consisting of halogenated lower alkyl, hydroxy lower alkyl, lower alkoxy lower alkyl and primary amino lower alkyl.
Claim 2
Dependent Claim 37 words
A 4,5',8-trimethyl psoralen having an organic functional substituent on the 4' carbon atom said substituent being selected from the group consisting of halogenated lower alkyl, hydroxy lower alkyl, lower alkoxy lower alkyl and primary amino lower alkyl.
Claim 3
Dependent Claim 4 words
The compound 4'-chloromethyl-4,5',8-trimethyl psoralen.
Claim 4
Dependent Claim 4 words
The compound 4'-chloromethyl-4,5',8-trimethyl psoralen.
Claim 5
Dependent Claim 4 words
The compound 4'-hydroxymethyl-4,5',8-trimethyl psoralen.
Claim 6
Dependent Claim 4 words
The compound 4'-hydroxymethyl-4,5',8-trimethyl psoralen.
Claim 7
Dependent Claim 4 words
The compound 4'-methoxymethyl-4,5',8-trimethyl psoralen.
Claim 8
Dependent Claim 4 words
The compound 4'-methoxymethyl-4,5',8-trimethyl psoralen.
Claim 9
Dependent Claim 5 words
The compound 4'-aminomethyl-4,5',8-trimethyl psoralen hydrochloride.
Claim 10
Dependent Claim 5 words
The compound 4'-aminomethyl-4,5',8-trimethyl psoralen hydrochloride.

References Cited (Backward Citations)

US3201421A Cited

USPTO Annuity & Maintenance Windows

Annuity Stage Window Opens Payment Deadline Surcharge Period Until Estimated Fee Status
3.5 Years (Year 4) 1981-11-06 1982-05-08 1982-11-07 $2000.00 Window Closed / Lapsed
7.5 Years (Year 8) 1985-11-06 1986-05-08 1986-11-07 $3760.00 Window Closed / Lapsed
11.5 Years (Year 12) 1989-11-06 1990-05-08 1990-11-07 $7700.00 Window Closed / Lapsed

Assigned Categories & Tags

No categories assigned to this patent yet.

Assign Category Tag