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A chromium ate-type reagent ‘Bu5CrLi2’ reacts with allylic and propargylic phosphates to generate the corresponding allyl- and propargylchromium (propargyl = prop-2-ynyl) reagents which further react with a variety of electrophiles such as aldehydes, ketones, imines, and isocyanates to afford the corresponding adducts in high yields.
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Hojo et al. (2001) studied this question.
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