3891677

Information

• Patent Grant
• 3891677

• References
• Source

• Patent Number

  3,891,677

• Date Filed

  Not available

• Date Issued

  Tuesday, June 24, 1975
  49 years ago

• CPC

  • C07J21/00 - Normal steroids containing carbon, hydrogen, halogen or oxygen having an oxygen-containing hetero ring spiro-condensed with the cyclopenta(a)hydrophenanthrene skeleton
  • C07J7/0045 - not substituted in position 16
  • C07J7/007 - not substituted in position 17 alfa
  • C07J41/0005 - the nitrogen atom being directly linked to the cyclopenta(a)hydro phenanthrene skeleton
  • C07J75/005 - Preparation of steroids by cyclization of non-steroid compounds
  • C07C2103/16 - (Hydrogenated) benz[e]indenes

• US Classifications

  • 549 - Organic compounds