Highly Stereoselective [3+2] Cycloadditions of Nitrile Oxides to Methyl 4-<i>O</i>-Acryloyl-6-deoxy-2,3-<i>O</i>-(<i>t</i>-butyldimethylsilyl)-α-<scp>d</scp>-glucopyranoside
作者:Kin-ichi Tadano、Tetsuo Tamai、Shingo Asano、Kiichiro Totani、Ken-ichi Takao
DOI:10.1055/s-2003-41404
日期:——
The [3+2] cycloadditions of benzonitrile oxide or pivalonitrile oxide to methyl 4-O-acryloyl-6-deoxy-2,3-di-O-(t-butyldimethylsilyl)-α-d-glucopyranoside provided the respective adducts, each as virtually a single diastereomer. By reductive removal of the carbohydrate template from each adduct, the respective (R)-enriched Î2-isoxazoline derivative was obtained.
苯甲腈氧化物或三甲基乙腈氧化物与甲基4-O-丙烯酰基-6-脱氧-2,3-二-O-(叔丁基二甲基硅基)-α-d-葡糖吡喃糖苷的[3+2]环加成反应,分别得到近乎单一的非对映异构体的加合物。通过还原性去除每个加合物中的碳水化合物模板,分别获得了富集(R)构型的Δ2-异恶唑啉衍生物。