hemiacetal
基本解釋
- n.半縮醛
英漢例句
- The thiophane ring was established via reduction of hemiacetal, mesylation of diol, and double SN2 substitution of dimesylate.
經(jīng)半縮醛的還原，甲磺酸酯化，硫代關(guān)環(huán)，構(gòu)建四氫噻吩環(huán)； - The thiophane ring was established via reduction of hemiacetal, tosylation of diol, and double SN2 substitution of ditosylate.
第二章設(shè)計(jì)了以從棕櫚籽制備的D-甘露糖為手性源，經(jīng)聚苯乙烯負(fù)載三氯化鐵催化異亞丙基化、苯甲?；Ｗo(hù)、選擇性水解、聚苯乙烯負(fù)載二乙酸碘苯氧化、Wittig-Horner反應(yīng)引入側(cè)鏈、催化氫化、一鍋法脫苯甲?；鞍肟s醛還原、對(duì)甲苯磺酸酯化、硫代關(guān)環(huán)、構(gòu)建四氫噻吩環(huán)； - With the absence of oxygen, branched alkaline would be produced.Whereas when oxygen was available, some other structures like hemiacetal, ether bond were produced.
其中無氧條件下可能發(fā)生側(cè)鏈烷烴交聯(lián)而形成支鏈，在有氧分子參與的情況下，反應(yīng)進(jìn)一步進(jìn)行形成一些架橋結(jié)合，諸如半縮醛、醚鍵等等。 - And finally we found that undering the catalysis of L-proline, the anhydride materials which are easily ringing formed hemiacetal cannot react with acetone using asymmetric Aldo reaction.
并發(fā)現(xiàn)，在L-脯氨酸催化下，易形成環(huán)狀半縮醛結(jié)構(gòu)的醛類化合物與丙酮不能進(jìn)行不對(duì)稱羥醛縮合反應(yīng)。 - any monosaccharide sugar that contains a ketone group or its hemiacetal.
任何一種含有酮基或其半縮醛的單糖。