94% overall yield. A convenient one-pot synthesis of primary aliphatic N-nitramines, which includes the nitration of available N,N′-dialkyloxalamides or N-alkylcarbamates with dinitrogenpentoxide in the 1,1,1,2-tetrafluoroethane media followed by ammonolysis of intermediate N-nitroamides in the same solvent has been developed. The method is environmentally safe, and affords target N-nitramines in up
METHOD FOR CATALYTIC PREPARATION OF HYDROMORPHONE AND HYDROCODONE
申请人:Kouznetsov Vladimir
公开号:US20080188661A1
公开(公告)日:2008-08-07
The present invention generally relates to catalysts of formula (III)
[M(P(R
a
)(R
b
)N(R
c
)(R
d
))
2
X
n
]
m
Y
p
that selectively convert morphine/codeine to hydromorphone/hydrocodone, and methods of use thereof.