Rhodium Carbenoid Mediated Cyclisations. Synthesis of 1,2-Diazetidinones (Aza-β-lactams).
Decomposition of the diazo hydrazides (1b-h) in boiling benzene in the presence of a catalytic amount of rhodium(II) acetate gives the corresponding 1,2-diazetidinones (2) in good yield.The aza-β-lactams (2) exhibit the expected high frequency carbonyl st
Lawton, Geoffrey,Moody, Christopher J.,Pearson, Christopher J.
p. 899 - 902
(2007/10/02)
SYNTHESIS OF AZA-β-LACTAMS BY RHODIUM CARBENOID MEDIATED CYCLISATION
Treatment of the diazo-compounds (3), obtained in two steps from readily available hydrazine derivatives (1), with a catalytic amount of rhodium (II) acetate in benzene gives the aza-β-lactams (4) in high yield.
Moody, Christopher J.,Pearson, Christopher J.,Lawton, Geoffrey
p. 3171 - 3172
(2007/10/02)
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