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Synthesis of optically active carbon 14 cyphenothrin carbon 14 labeling at the vinyl carbon



Synthesis of optically active carbon 14 cyphenothrin carbon 14 labeling at the vinyl carbon



Radioisotopes 35(5): 242-248



Optically active cyphenothrins, .alpha.-cyano-3-phenoxybenzyl (1R)-cis- and (1R)-trans-chrysanthermates, were labelled with 14C at the vinyl position for use in metabolic studies. The key intermediates, (1R)-cis- and (1R)-trans-chrysanthemic-(propenyl-2-14C) acids (9a and 9b), were synthesized stereospecifically by applying the Wittig reaction of 14C-labelled phosphorane (6) with optically active formyl esters (7a and 7b).

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