Triply convergent, stereospecific alkene formation via Peterson olefination
摘要:
alpha-Iodo silanes 8 were prepared from alpha-hydroxy silanes and after halogen/metal exchange and treatment with copper(I) bromide-dimethyl sulfide were coupled with acid chlorides to yield alpha-silyl ketones 2. Cram controlled addition with a variety of nucleophiles followed by treatment with acid or base led to either the (E)- or (Z)-alkene in good overall yields from the iodide (47-67%) and with excellent stereoselectivities ( > 95/ < 5 for disubstituted cases and 67/33 to 95/5 for trisubstituted). The procedure was used iteratively in the total synthesis of 4(E),8(Z)-tetradecadien-1-yl acetate (15) in > 95/ < 5 isomeric purity.
Dimerization and codimerization of higher ?-olefins, catalyzed by zirconium complexes
作者:O. S. Vostrikova、A. G. Ibragimov、G. A. Tolstikov、L. M. Zelenova、U. M. Dzhemilev
DOI:10.1007/bf00951226
日期:1980.10
Stereoselective alkene synthesis via (.alpha.-chloroalkyl)(dimethyl)phenylsilanes and .alpha.-(dimethyl)phenylsilyl ketones
作者:Anthony G. M. Barrett、Jason M. Hill、Eli M. Wallace
DOI:10.1021/jo00027a069
日期:1992.1
Triply convergent, stereospecific alkene formation via Peterson olefination
作者:Anthony G. M. Barrett、John A. Flygare
DOI:10.1021/jo00002a028
日期:1991.1
alpha-Iodo silanes 8 were prepared from alpha-hydroxy silanes and after halogen/metal exchange and treatment with copper(I) bromide-dimethyl sulfide were coupled with acid chlorides to yield alpha-silyl ketones 2. Cram controlled addition with a variety of nucleophiles followed by treatment with acid or base led to either the (E)- or (Z)-alkene in good overall yields from the iodide (47-67%) and with excellent stereoselectivities ( > 95/ < 5 for disubstituted cases and 67/33 to 95/5 for trisubstituted). The procedure was used iteratively in the total synthesis of 4(E),8(Z)-tetradecadien-1-yl acetate (15) in > 95/ < 5 isomeric purity.