title: Synthesis and antimicrobial activity of 7 alpha-amino-23,24-bisnor-5 alpha-cholan-22-ol derivatives.
abstract: A series of 7 alpha-aminobisnorsteroids were synthesized and their in vitro antimicrobial activity was evaluated regarding Gram-positive and Gram-negative bacteria. The stereoselective reductive amination of 7-ketosteroid 3 with NH(4)OAc, in the presence of NaBH(3)CN, afforded a high yield of 7 alpha-aminosteroid 4. The 3,7-diaminobisnorsteroids were obtained by the reductive amination of 4 with NH(4)OT(f), Boc-spermidine, and Boc-spermine. 3 alpha,7 alpha-Diaminobisnorsterol dihydrochloride 15 showed the highest antimicrobial activity against Streptococcus pyogenes 308 A with a MIC value of 1.6 microg/mL. Hemolytic activities of the compounds 13-20 were determined. Compound 13 showed MHC value at 100 microg/mL.
authors: Department of Applied Chemistry, Kyungpook National University, Daegu 702-701, Republic of Korea.
authors: Sharaf Nawaz
authors: SN
authors: Khan
authors: Young Mee
authors: YM
authors: Jung
authors: Bong Jin
authors: BJ
authors: Kim
authors: Heeyeong
authors: H
authors: Cho
authors: Jinho
authors: J
authors: Lee
authors: Hong-Seok
authors: HS
authors: Kim
mesh_terms: D000586:Amination; D000900:Anti-Bacterial Agents / Q000138:chemical synthesis* / Q000737:chemistry / Q000494:pharmacology*; D050296:Microbial Viability / Q000187:drug effects; D015394:Molecular Structure; D011283:Pregnenes / Q000138:chemical synthesis* / Q000737:chemistry / Q000494:pharmacology*; D013329:Structure-Activity Relationship
chemical_list: D000900:Anti-Bacterial Agents; D011283:Pregnenes