SCHEDULED MAINTENANCE
Transition metal-catalysed carbene- and nitrene transfer to carbon monoxide and isocyanides
T. R.
Roose, 
†a
D. S.
Verdoorn,
†bc
P.
Mampuys,
c
E.
Ruijter,
*a
B. U. W.
Maes
*c
and
R. V. A.
Orru
*b
†a
D. S.
Verdoorn,
†bc
P.
Mampuys,
c
E.
Ruijter,
*a
B. U. W.
Maes
*c
and
R. V. A.
Orru
*b
Abstract
Transition metal-catalysed carbene- and nitrene transfer to the C1-building blocks carbon monoxide and isocyanides provides heteroallenes (i.e. ketenes, isocyanates, ketenimines and carbodiimides). These are versatile and reactive compounds allowing in situ transformation towards numerous functional groups and organic compounds, including heterocycles. Both one-pot and tandem processes have been developed providing valuable synthetic methods for the organic chemistry toolbox. This review discusses all known transition metal-catalysed carbene- and nitrene transfer reactions towards carbon monoxide and isocyanides and in situ transformation of the heteroallenes hereby obtained, with a special focus on the general mechanistic considerations.
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