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Catalytic Enantioselective Preparation of α-Substituted Allylboronates: One-Pot Addition to Functionalized Aldehydes and a Route to Chiral Allylic Trifluoroborate Reagents.

✍ Scribed by Lisa Carosi; Dennis G. Hall

Publisher
John Wiley and Sons
Year
2007
Weight
32 KB
Volume
38
Category
Article
ISSN
0931-7597

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Enantioselective Catalytic Addition of Functionalized Dialkylzinc Compounds to β-Stannylated Aldehydes: A Convenient Preparation of Chiral β- and γ-Functionalized Secondary Alcohols
✍ Dr. Walter Brieden; Roswitha Ostwald; Prof. Dr. Paul Knochel 📂 Article 📅 1993 🏛 John Wiley and Sons 🌐 English ⚖ 407 KB 👁 1 views

To nBuLi (2.9 g. 46 mmol), constantly stirred at -8O"C, precooled pentane was added dropwise until a homogeneous solution was obtained (ca. 20 mL). After one week at -90 "C colorless blocks crystallized with a melting point of -34(2) 'C. rBuLi: tBuLi (2.2 g, 34 mmol) was treated as described for nBu