82621-90-7

Basic information

• Product Name: 3-bromo-2-methylbutanoyl isocyanate
• CAS NO: 82621-90-7
• Molecular Weight: 206.039
• Mol File: 82621-90-7.mol
• Article Data: 1

Chemical Properties

• CAS DataBase Reference: 3-bromo-2-methylbutanoyl isocyanate(CAS DataBase Reference)
• NIST Chemistry Reference: 3-bromo-2-methylbutanoyl isocyanate(82621-90-7)
• EPA Substance Registry System: 3-bromo-2-methylbutanoyl isocyanate(82621-90-7)

Safety Data

• Hazardous Substances Data: 82621-90-7(Hazardous Substances Data)

Upstream product

• 82621-78-1 2,3-dimethyl-N-bromosuccinimide 

Relevant articles and documents

Excited-State ? Succimidyl and Glutarimidyl Radicals: Reversible Ring Opening

The free-radical isomerization of N-bromosuccinimide to β-bromopropionyl isocyanate has been examined.Of the two varieties of succinimidyl radical (S? or S?), only the ? excited state undergoes the ring opening to the β propionyl isocyanatyl radical.The conversion optimally takes place in >95percent yield.The dependence of NBS concentration along with results obtained from deuterium labeling studies indicate that the ring opening of S? is a reversible process.This explains the failure of N-chlorosuccinimide to produce β-chloropropionyl isocyanate, as well as the increase in ring-opened product for N-bromosuccinimides upon methyl substitution at the 2- and/or 3-position of the succinimidyl ring, since the open-chain radical intermediates are more stable.In the N-bromoglutarimide system, methyl groups on the 2-position are required for the glutarimidyl radicals to undergo the isomerization, ultimately producing isocyanates.The radical-chain nature of these systems is confirmed.