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- Moreover, there is a chiral quaternary carbon in the1-hydroxyethylidenediphosphonic (hedp) ligand. 證實(shí)1-羥基乙叉-1,1-二膦酸配體(hedp)中的季碳為手性碳原子。
- These ligands were found to be very effective in construction of quaternary carbon centers by using asymmetric allylic alkylation. 這類(lèi)配體在前手性親核試劑的不對稱(chēng)烯丙基化構筑手性季碳中心的反應中，顯示了較好的反應活性及對映選擇性。
- Keywords Nitroolefinic lactone;Quaternary carbon center;Stereoselective synthesis; 硝基乙烯內酯;季碳中心;立體選擇合成;
- Keywords nitroolefins;quaternary carbon center;stereoselective synthesis;reaction; 烴基-4-硝基乙烯基-2`3-苯并吡喃酮;季碳;立體選擇合成;反應;
- Synthesis of Novel Diphosphine Ligands and Their Applications in Palladium- Catalyzed Allylic Alkylation to Construct Chiral Quaternary Carbon Center 新型雙膦配體及鈀催化的烯丙基烷基化反應用于構筑季碳手性中心
- I make a carbon copy of my documents. 我用復寫(xiě)紙復寫(xiě)文件。
- Soft drinks contain carbon dioxide. 軟飲料中含有二氧化碳。
- I have some carbon paper somewhere or other. 我記得我在什么地方放有復寫(xiě)紙。
- She's a carbon copy of her sister. 她跟她姐姐一模一樣。
- The Quaternary sediments are largely undeformed. 第四紀的沉積物大部分未變形。
- Cationics are usually quaternary ammomium salts. 陽(yáng)離子表面活性劑通常為季銨鹽類(lèi)。
- A copy made by using carbon paper. 復寫(xiě)本，副本用復寫(xiě)紙復印的一份
- a quaternary carbon atom 季碳原子
- Plants can absorb carbon dioxide and release oxygen. 植物可以吸收二氧化碳釋放氧氣。
- Design of quaternary Schmitt circuits. 四值施密特電路設計。
- IS THERE REALLY QUATERNARY GLACIATION ON LUSHAN? 廬山真的有第四紀冰川嗎?
- quaternary carbon atom 季碳原子
- You receive the top copy of the receipt, and we keep the carbon. 你把這收據上面的原件收下，我們保留下面的復寫(xiě)件。
- The stick of carbon is often used in an electric arc lamp. 碳精棒常用于電弧燈。
- LATE QUATERNARY CARBONATE RECORDS IN THE WEST FLANK OF JUAN DE FUCA RIDGE, NORTHEASTERN PACIFIC OCE 東北太平洋胡安·德富卡隆起西翼晚第四紀以來(lái)的碳酸鹽記錄
