Abstract
The reaction of chiral allenyltitaniums, generated from optically active secondary propargyl phosphates and a Ti(O- i-Pr) 4/2 i-PrMgCl reagent, with trialkylstannyl chloride proceeded with a high chirality transfer of more than 93% to afford optically active secondary propargylstannanes in excellent yield, and which, in turn, were converted to optically active ( Z)-allylstannanes by reaction with Ti(O- i-Pr) 4/2 i-PrMgCl and the following hydrolysis.
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