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All articles of this category The reaction of styrene and t -butyl α-diazoacetate in the presence of ( R , R )-(ON + )(salen)ruthenium(II) complex 1 under the irradiation of incandescent light in THF gave the corresponding (1 S ,2 R )-cyclopropanecarboxylate with high stereoselectivity of 99% ee ( cis : trans = 96 : 4), while the same reaction in hexane gave the enantiomeric (1 R ,2 S )-cyclopropanecarboxylate preferentially (83% ee, cis : trans = 68 : 32). (ON + )(salen)ruthenium(II) complex - photo-activation - cyclopropanation - cis -selectivity
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Uchida et al. (1999) studied this question.
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