科研之友
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摘要
Alkyl dioxazaborolidines are air-stable and often crystalline organoboranes. A variety of Bronsted acids activate allyl dioxazaborolidines to generate reactive allyl-transfer reagents in situ. These reagents add to aldehydes and ketones to generate the corresponding alcohols in good yields under mild conditions. The E- and Z-crotyl reagents react diastereoselectively with aldehydes and ketones to produce anti and syn adducts, respectively, a result consistent with a cyclic transition state (type I mechanism).
- 出版日期2010-11-5
