Abstract
High-pressure (4+2)cycloaddition of 1-methoxybuta-1,3-diene ( 1 ) to three representative sugar aldehydes 3 , 4 , and 5 in the presence and without Eu(fod) 3 was studied. The effects of pressure and catalyst on asymmetric induction were examined. Stereochemical models were used for interpretation of the results.
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