(6RS,7SR)-7-acetyl-8-oxo-3-oxa-1-aza-bicyclo[4.2.0]octane-2-spirocyclohexane 、
甲烷磺酰基叠氮化物 在
potassium hydride 作用下,
以75%的产率得到5''-hydroxy-5''-methyl-1''-methylsulfonyl-8'-oxo-(cyclohexane)spiro-2'-(3'-oxa-1'-azabicyclo<4.2.0>octane)-7'-spiro-4''-(<1''H>-<4'',5''>dihydro<1'',2'',3''>triazole)