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- Diazaspiro [4.4] nonane was synthesized from malononitrile as the starting material by a series of nucleleophilic displacement, hydrolytic cyclization and carbonyl reduction. 摘要以丙二腈为原料,经过亲核取代、水解环合、羰基还原系列反应,合成了2,7-二氮螺[4.;4]壬烷。
- METHODS Target compound was synthesized by steps of benzyl protection, carbonyl reduction, deprotection and benzene reduction. 方法以邻苯二甲酰亚胺为原料,经过苄基保护、羰基还原、脱保护和苯环还原四步反应合成目标产物。
- METHODS Target compound was synthesized by steps of benzyl protection,carbonyl reduction,deprotection and benzene reduction. 方法以邻苯二甲酰亚胺为原料,经过苄基保护、羰基还原、脱保护和苯环还原四步反应合成目标产物。
- Keywords biocatalysis;asymmetric reduction;asymmetric synthesis;carbonyl reduction;chiral alcohol;prochiral ketone; 生物催化;不对称还原;不对称合成;羰基还原;手性醇;前手性酮;
- The reduction of unemployment should be paramount. 降低失业率应是头等大事。
- carbonyl reduction 羰基还原
- The forthcoming talk hold out the hope of real arms reduction. 即将举行的会谈给实现真正的裁军带来了希望。
- Queue forme at the ticket office when the news of the fare reduction get out. 票价下调的消息一传出,售票处前就排起了队。
- A reduction in pace, force, or intensity; a slowdown. 减慢,放松速度、力量或强度减弱; 放慢
- What reduction will you make on this article? 这个东西你要减价多少?
- There is no room for any reduction in price. 价格毫无再减的余地了。
- The talks resulted in reducing the number of missiles/missile reduction. 谈判结果削减了导弹数量。
- Keywords Low valent titanium;Carbonyl reductive coupling reaction;Cemorane-type diterpenoids;Natural products;Total syntheses; 低价钛;羰基还原偶合反应;西松烷型二萜;天然产物;全合成;
- Negotiating a reduction in nuclear arms is a long and arduous undertaking. 有关削减核武器的谈判是一项漫长而艰苦的工作
- Reduction in the purchasing value of money. 贬值钱的购买价值的降低
- Cyclopropane carbonyl chloride is an important intermediate. 环丙甲酰氯是一种重要的中间体。
- A reduction in value, amount, or degree. 减低价值、程度或数量的减少
- The temperature of carbonyl synthesis reaction is studied. 摘要对羰基合成反应的温度进行了研究。
- A reduction of the entered value of an asset. 降低,划减资产帐面价值的降低
- We can not do more than a 2% reduction. 我们只能降价百分之二,不能再多了。