carbenes and nitrenes reaction intermidiates · singlet singlet and triplet states x-sn singlet...
Post on 05-Nov-2019
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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
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