Abstract
The generation of (2-PyMe 2 Si) 2 CHLi was easily accomplished by the deprotonation of (2-PyMe 2 Si) 2 CH 2 using n -BuLi in Et 2 O. The 1 H NMR analysis of (2-PyMe 2 Si) 2 CHLi in Et 2 O- d 10 revealed the coordination of both pyridyl groups to lithium. Thus generated (2-PyMe 2 Si) 2 CHLi was found to react with a variety of aldehydes and ketones to give the corresponding vinylsilanes in extremely high yields with complete stereoselectivities (>99% E ). Graphic
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