Abstract
(E)-1-Alkenyl alkyl ketones [(E)-α-Enones] are prepared in high yields and with high stereoselectivity by reaction of (2-oxoalkyl)triphenylarsonium bromides with aldehydes under solid-liquid phase-transfer conditions. Application of this methodology to the preparation of key intermediates for the synthesis of brassinosteroid and prostaglandin PGF is also reported.

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