CARBENES AND NITRENES

REACTION INTERMEDIATES

Dr.Phadnaik

Triplet state is more stable than singlet state

Singlet

Triplett

RING EXPANSION REACTION

a)

+ _h

or

R N + N2

b)h

or

c)

N NNR

R = alkyl,aryl, H

+ _

N NNSO2R NSO2R + N2

h

or

+ _

N NNC

O

RO NC

O

RO + N2

d) SO2ONHRO

O

C NO2

base

C

O

RO N NO2SO2O

C

O

RO N + NO2SO2O

_

(nosylate)

R = alkyl, aryl

R = alkyl, aryl

_

Thank You