Tetrahedron Asymmetry p. 1283 - 1294 (1995)
Update date:2022-09-26
Topics:
Camps, Pelayo
Farres, Xavier
Garcia, Luisa
Ginesta, Joan
Pascual, Jaume
et al.
Stereoselective syntheses of both enantiomers of ketoconazole (1) from commercially available (R)- or (S)-epichlorohydrin has been developed.The key-step of syntheses involves the selective substitution of the methylene chlorine atom by benzoate on a mixture of (2S,4R)-14a and (2R,4R)-15a or of their enentiomers, followed by crystalization of the corresponding cis-benzoates, (2R,4R)-18 or (2S,4S)-18, from which (+)- or (-)-1 were obtained as described for (+/-)-1.The ee's of (+)- and (-)-ketocanazole were determined by HPLC on the CSP Chiracel OD-H.
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