Ireland-Claisen rearrangements of chiral (Z)-vinylsilanes. Highly diastereoselective synthesis of anti-.alpha.-alkoxy-.beta.-(dimethylphenylsilyl)-(E)-hex-4-enoates
摘要:
DOI:
10.1021/jo00041a055
作为产物:
描述:
(R)-4-(dimethyl(phenyl)silyl)-but-3-yn-2-yl acetate 在
palladium on calcium fluoride poisoned with lead 喹啉 、 lithium aluminium tetrahydride 、 氢气 作用下,
以
乙醚 、 正戊烷 为溶剂,
25.0 ℃
、101.33 kPa
条件下,
生成 (R)-(Z)-1-(Dimethylphenylsilyl)-1-buten-3-ol
参考文献:
名称:
Ireland-Claisen rearrangements of chiral (Z)-vinylsilanes. Highly diastereoselective synthesis of anti-.alpha.-alkoxy-.beta.-(dimethylphenylsilyl)-(E)-hex-4-enoates
Stereoselective Synthesis of (<i>Z</i>)- and (<i>E</i>)-Allylic Silanes by Copper-Mediated Substitution Reactions of Allylic Carbamates with Grignard Reagents
作者:Jacqueline H. Smitrovich、K. A. Woerpel
DOI:10.1021/jo991312r
日期:2000.3.1
Both (Z)- and (E)-allylic silanes were prepared with high stereoselectivity by the copper-mediated substitution of allylic carbamates by organometallic reagents. The reaction of alkylmagnesium reagents with (E)-allylic carbamates provides (Z)-allylic silanes, whereas both alkylmagnesium and alkyllithium reagents react with (Z)-allylic carbamates to afford (E)-allylic silanes. Because Grignard reagents