Stereoselective Synthesis of (Z)-α-Bromovinylstannanes and (E)-α-Iodovinylstannanes via Hydrozircona

• 出 处: Chinese Chemical Letters
• 发表日期: 2004年03期
• 关键词: iodine substituted convenient afford attractive bromo reagent methoxy preference

Alkynylstannanes 1 react with Cp2Zr(H)Cl (Cp=?-C5H5) giving (Z)--stannylvinyl- zirconium complexes 2, which are trapped with NBS or iodine in THF at 0C to stereoselectively afford (Z)-a-bromovinylstannanes and (E)- a-iodovinylstannanes 3, respectively.

(Q) -stannylvinyl-zirconium complexes 2, which are trapped with NBS or iodine in THF at 0C to stereoselectively afford (Z) -a-bromovinylstannanes and (E) - a-iodovinylstannanes 3, respectively.