Stereocontrol in organic synthesis using silicon-containing compounds. Studies directed towards the synthesis of ebelactone AElectronic supplementary information (ESI) available: Experimental section. See http://www.rsc.org/suppdata/ob/b3/b316899a/
作者:Sarah C. Archibald、David J. Barden、J�r�me F. Y. Bazin、Ian Fleming、Colin F. Foster、Ajay K. Mandal、Amit K. Mandal、David Parker、Ken Takaki、Anne C. Ware、Anne R. B. Williams、Anna B. Zwicky
DOI:10.1039/b316899a
日期:——
Several approaches to the synthesis of ebelactone A 2 are described, culminating in the synthesis of the benzenesulfonate of 2-epi-ebelactone A 161. All the approaches were based on three fragments A, B and C, originally defined in general terms in, but eventually used as the aldehyde 72, the allenylsilane 3 and the aldehyde 139, respectively. They were joined, first B with C, and then B+C with A.
Titanium tetrachloride promoted reaction of silyl ketene acetals with epoxides: a new method for the synthesis of γ-butanolides
作者:Veselin Maslak、Radomir Matović、Radomir N. Saičić
DOI:10.1016/s0040-4039(02)01070-5
日期:2002.7
A new method for the synthesis of γ-butanolides is described. The titaniumtetrachloride promoted reaction of silyl ketene acetals with epoxides, followed by acidic work-up, affords the corresponding butyrolactones in 44–83% yield.
Reaction of silyl ketene acetals with epoxides: a new method for the synthesis of γ-butanolides
作者:Veselin Maslak、Radomir Matović、Radomir N. Saičić
DOI:10.1016/j.tet.2004.07.007
日期:2004.9
Titanium tetrachloride promoted reaction of silyl ketene acetals with epoxides, followed by acidic work-up, affords butanolides in moderate/good yields. With epihalohydrins the reaction is regioselective and occurs at the less substituted end of the epoxide; the γ-haloalkyl-γ-butanolides thus obtained can be further transformed into various products.
Unusual cyclopropanol formation from a β-silyl aldehyde
作者:Ian Fleming、Ajay K. Mandal
DOI:10.1039/a901920k
日期:——
The hemiacetals 15 and 18 gave cyclopropanols 17 and 20 when treated with NaH in DMSO, showing that the silyl group has enhanced electrofugal powers because of the participation of the oxyanion.
在二甲基亚砜中用 NaH 处理半乙酸酯 15 和 18 时,可得到环丙醇 17 和 20,这表明由于氧阴离子的参与,硅基的电逸散能力增强了。
Polyhydroxyalkanoate having vinyl group, ester group, carboxyl group, and sulfonic group, and method of producing the same
申请人:Kenmoku Takashi
公开号:US20070073006A1
公开(公告)日:2007-03-29
To provide a novel polyhydroxyalkanoate having a reactive functional group in a molecule and a method of producing the same; and a novel polyhydroxyalkanoate having a new function obtained by chemically modifying the polyhydroxyalkanoate having a reactive functional group and a method of producing the same. By utilizing a vinyl group of a polyhydroxyalkanoate containing a unit having the vinyl group at a side chain thereof, a polyhydroxyalkanoate containing units having a carboxyl group, an amide group, and a sulfonic group in a molecule is induced.