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)，搆建四氫噻吩環(huán)； - The thiophane ring was established via reduction of hemiacetal, tosylation of diol, and double SN2 substitution of ditosylate.
第二章設(shè)計了以從棕櫚籽制備的D-甘露糖爲手性源，經(jīng)聚苯乙烯負載三氯化鉄催化異亞丙基化、苯甲醯基保護、選擇性水解、聚苯乙烯負載二乙酸碘苯氧化、Wittig-Horner反應(yīng)引入側(cè)鏈、催化氫化、一鍋法脫苯甲醯基及半縮醛還原、對甲苯磺酸酯化、硫代關(guān)環(huán)、搆建四氫噻吩環(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，在有氧分子蓡與的情況下，反應(yīng)進一步進行形成一些架橋結(jié)郃，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.
竝發(fā)現(xiàn)，在L-脯氨酸催化下，易形成環(huán)狀半縮醛結(jié)搆的醛類化郃物與丙酮不能進行不對稱羥醛縮郃反應(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。