Abstract
A zirconocene catalyst was discovered to perform Negishi carboaluminations with a variety of alkynes and electrophiles in high yields and excellent regioselectivities and stereoselectivities favoring the E-isomer (usually >99:1 E/Z). Tandem carboalumination-1,4-addition and carboalumination-C-C bond formation were also reported with high yields and regioselectivities. This methodology for the synthesis of the important coenzyme Q10 was successfully extended.
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