Epoxidation Flashcards
(7 cards)
1
Q
Epoxidation reagets
A
Peracid
Br2/NaOh,H20
NBS/H20
H2O2/OH-, H2O2/H+
DMDO
S –YLIDE
2
Q
Types of peracid
A
CH3(CO) OOH
CF3(CO) OOH
BENZENE(CO) OOH
mCPBA
mBPBA
Meta nitro perbenzoic acid
3
Q
Rate of peracid
A
CF3>MCPBA≈HCOOH>CH3COOH»»H2O2> TERTIARY BUOOH
4
Q
Epoxidation is a stereospecific means
A
Cis substrate = cis product
Kaki epoxidation one step rxn bhi hai to
Agr 2 step hoti to cis se Trans mil skta tha
5
Q
Agr ek hee ring me 2 epoxidation Hota hai to dono ki stereo kaisi hogi
A
Opposite
6
Q
Agr jis tarf bulkiness ho ussi side epoxidation karwna ho yo
A
Use reagent
Br2/NaOH,kOH
NBS/H2O
7
Q
mCPBA or Br2/ koh require electron rich alkene
But h2o2 form epoxide on
A
Electron deficient alkene
