Efficient Approach to 3,3-Bissilyl Carbonyl and Enol Derivatives via Retro-[1,4] Brook Rearrangement of 3-Silyl Allyloxysilanes
作者:Zhenlei Song、Zheng Lei、Lu Gao、Xia Wu、Linjie Li
DOI:10.1021/ol102352w
日期:2010.11.19
A facile and highly stereoselective retro-[1,4] Brook rearrangement of 3-silyl allyloxysilanes has been discovered. While basic hydrolysis of the formed (Z)-3,3-bissilyl lithium enolates provides 3,3-bissilyl carbonyl compounds efficiently, trapping the species with various electrophiles including alkyl halides leads to the exclusive O-substituted (Z)-3,3-bissilyl enol derivatives that can undergo
Studies on retro-[1,4] Brook rearrangement of 3-silyl allyloxysilanes. Observation of the formation of unusual 3,3-bissilyl enols
作者:Zubao Gan、Ya Wu、Lu Gao、Xianwei Sun、Jian Lei、Zhenlei Song、Linjie Li
DOI:10.1016/j.tet.2012.06.005
日期:2012.8
Detailed investigations of the retro-[1,4] Brook rearrangement of 3-silyl allyloxysilanes are described. Based on control experiments and NMR studies, rationalizations are proposed for the formation of 3,3-bissilyl enols, unusual compounds that are stable to acidic hydrolysis but that can be transformed into the corresponding aldehydes under basic hydrolysis conditions. These studies further show that
Tunable reactivity of geminal bis(silyl) enol derivatives leading to selective exo-IEDDA or Sakurai allylation with a β,γ-unsaturated ketoester
作者:Zubao Gan、Zhiwen Chu、Jia Hu、Zhishan Su、Changwei Hu、Lu Gao、Zhenlei Song
DOI:10.1039/c6cc04593f
日期:——
Two contrasting pathways in a SnCl4-catalyzed reaction of geminal bis(silyl) enol derivatives with β,γ-unsaturated ketoesters have been achieved by tuning the R group in the enol moiety.