Diastereoselective addition of γ-alkylthio-allylboronates to aldehydes
作者:Reinhard W. Hoffmann、Bruno Kemper
DOI:10.1016/s0040-4039(00)71145-2
日期:1980.1
The Z- and E-γ-alkylthio-allylboronates 5 and 10 were found to add aldehydes forming diastereoselectively the adducts 7 and 6 respectively in high yield.
Acyclic stereocontrol in the addition of γ-alkylthio-allylboronates to aldehydes
作者:Reinhard W. Hoffmann、Bruno Kemper
DOI:10.1016/0040-4020(84)80004-6
日期:1984.1
The Z-isomer 10 of the γ-alkylthio-allylboronates adds to aldehydes giving the syn diastereomer 4 of the product homoallyl-alcohol. The E-isomer 12 leads in turn to the anti-diastereomer 5 with a high degree of acyclicstereocontrol. Kinetic diastereoselection can be applied to obtain the anti-diastereomer 5 even when using E/Z-mixtures of the γ-alkylthio-allylboronates.
γ-烷硫基-烯丙基硼酸酯的Z-异构体10加到醛中,得到产物均烯丙基醇的顺式非对映异构体4。该ê异构体12根依次引线反非对映体5具有高度的非循环立体控制。动能diastereoselection可应用于获得抗非对映体5使用时甚至E / Z -mixtures的γ烷硫基allylboronates的。
HOFFMAN, R. W.;KEMPER, B., TETRAHEDRON, 1984, 40, N 12, 2219-2224