3858-57-9

Basic information

• Product Name: 2β-Brom-5α-methyl-cholestanon-(3)
• CAS NO: 3858-57-9
• Molecular Weight: 479.585
• Mol File: 3858-57-9.mol
• Article Data: 1

Chemical Properties

• CAS DataBase Reference: 2β-Brom-5α-methyl-cholestanon-(3)(CAS DataBase Reference)
• NIST Chemistry Reference: 2β-Brom-5α-methyl-cholestanon-(3)(3858-57-9)
• EPA Substance Registry System: 2β-Brom-5α-methyl-cholestanon-(3)(3858-57-9)

Safety Data

• Hazardous Substances Data: 3858-57-9(Hazardous Substances Data)

Upstream product

• 1858-20-4 acetoxy-3 methyl-5α cholestene-2 

Relevant articles and documents

STEREOCHIMIE-LVII ETUDE STEREOCHIMIQUE ET CINETIQUE DE LA BROMATION D'ESTERS ET D'ETHERS ENOLIQUES STEROIDIQUES

Absolute rates of bromination were measured for two series of derivatives of steroidal ketones 3, enol acetates 1 and enol methyl ether 2.Axial substituents exhibited a large effect on rates, which increased by 15,000 fold on going from (X=CH3; Y=CN) to (X=Y=H).From the bromide ion effect it was concluded that the first step (formation of an intermediate bromonium ion) was reversible and that the second step (formation of haloketones 4 or 5 or of haloacetals 8 or 9) was slow compared to the first step.The intermediate was concluded to be a highly unsymmetrical bromonium ion rather than a plain oxocarbenium ion.