129400-04-0

Basic information

• Product Name: 19,19-difluoroandrost-4-en-17-one
• Synonyms: 19,19-difluoroandrost-4-en-17-one
• CAS NO: 129400-04-0
• Molecular Formula: C19H26 F2 O
• Molecular Weight: 308.41
• Mol File: 129400-04-0.mol
• Article Data: 1

Chemical Properties

• Boiling Point: 396.4°C at 760 mmHg
• Flash Point: 151°C
• Appearance: /
• Density: 1.14g/cm³
• Vapor Pressure: 1.72E-06mmHg at 25°C
• Refractive Index: 1.518
• CAS DataBase Reference: 19,19-difluoroandrost-4-en-17-one(CAS DataBase Reference)
• NIST Chemistry Reference: 19,19-difluoroandrost-4-en-17-one(129400-04-0)
• EPA Substance Registry System: 19,19-difluoroandrost-4-en-17-one(129400-04-0)

Safety Data

• Hazardous Substances Data: 129400-04-0(Hazardous Substances Data)

Usage

InChI:InChI=1/C19H26F2O/c1-18-11-9-15-13(14(18)7-8-16(18)22)6-5-12-4-2-3-10-19(12,15)17(20)21/h4,13-15,17H,2-3,5-11H2,1H3/t13-,14-,15-,18-,19+/m0/s1

Upstream product

• 129400-05-1 19,19-difluoroandrost-4-en-17β-ol 
• 129399-96-8 3,3-(ethylenedithio)-19,19-difluoroandrost-4-en-17-one 
• 7764-45-6 19,19-difluoroandrost-4-ene-3,17-dione 

Relevant articles and documents

Synthesis and Biochemical Studies of 16- or 19-Substituted Androst-4-enes as Aromatase Inhibitors

Androst-4-en-17-one derivatives and androst-4-en-17β-ol derivatives 3, 5, 10, 12, and 19 were synthesized and tested for their ability to inhibit aromatase in human placental microsomes.All the 17-oxo steroids, except compound 25 and 17,19-diol 3 of this series, were effective competitive inhibitors with apparent Ki's ranging from 170 to 455 nM. 19,19-Difluoro steroid 18 and 19-acetylenic alcohol 25, a weak competitive inhibitor (Ki = 7.75 μM), caused a time-dependent, pseudo-first-order inactivation of aromatase activity with kinact's of 0.0213 and 0.1053 min-1 for compounds 18 and 25, respectively.NADPH and oxygen were required for the time-dependent inactivation, and the substrate, androst-4-ene-3,17-dione, prevented it, but a nucleophile, L-cysteine, did not in each case.The results strongly suggest that aromatase would attack the 19-carbon of steroids 18 and 25.