Telluro-directed regiospecific and highly stereoselective reaction of ethyl 5-telluro-(2E,4Z)-pentadienoate with organocopper reagents

Add time:07/24/2019    Source:sciencedirect.com

Ethyl 5-telluro-(2E,4Z)-pentadienoate 2, which is prepared by the Wittig olefination of (Z)-β-telluroacrolein 1, reacted very rapidly with organocuprates 3 at −78°C to form exclusively the corresponding 5-substituted products 4 with high stereoselectivity and in excellent yields.

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