英语翻译In our previous study,17 we introduced Y(NO3)36H2O,as a novel catalyst for Biginelli and aza-Michael reactions.The catalyst showed remarkable activity and reusability affording high yields of the desired products.The co-ordinatingability

英语翻译In our previous study,17 we introduced Y(NO3)36H2O,as a novel catalyst for Biginelli and aza-Michael reactions.The catalyst showed remarkable activity and reusability affording high yields of the desired products.The co-ordinatingability
英语翻译
In our previous study,17 we introduced Y(NO3)36H2O,as a novel catalyst for Biginelli and aza-Michael reactions.
The catalyst showed remarkable activity and reusability affording high yields of the desired products.The co-ordinating
ability of Y(NO3)36H2O along with its commercial availability prompted us to investigate its activity for ring opening of epoxides.
We herein report a general protocol for aminolysis of aliphatic/aromatic epoxides with a wide variety of amines under solvent-free conditions(Scheme1).
Initially,the ring opening of styrene oxide with aniline was chosen as a model and the role of various solvents
and catalysts on the reaction system was investigated.Solvents such as water,toluene,tetrahydrofuran,methylene
dichloride,and methanol(Table1,entries 1–5) providedlow yields of the desired product (5–12%),while
the same reaction under solvent-free conditions afforded a 92% yield within 1h.The high reaction rate observed
could be attributed to the fact that,under solvent-free conditions,the concentration of catalyst is greater leading to
rate enhancement as compared to the same reaction in the presence of solvent.Further,the effect of various metal
nitrates on the reaction system was examined (Table 1,entries 6–11).Y(NO3)36H2O and La(NO3)36H2O provided
excellent yields of the desired product within a short reaction time (1h).However,since Y(NO3)36H2O afforded high regioselectivity
towards the major isomer (2-Table 3 Ring opening of epoxides with heteroaromatic aminesa
anilino-2-phenylethanol),it was used for further study.

英语翻译In our previous study,17 we introduced Y(NO3)36H2O,as a novel catalyst for Biginelli and aza-Michael reactions.The catalyst showed remarkable activity and reusability affording high yields of the desired products.The co-ordinatingability
在我们先前的研究,17日我们推出了Y （下硝酸） 36h2o ,作为一种新型催化剂biginelli和氮杂迈克尔的反应.
催化剂显示了显着的活动和重用,给予高收益的理想产品.统筹
能力的Y （硝酸） 36h2o随着其商业供货,促使我们探讨其活动,为开环环氧化物.
我们在此报告的一般议定书胺解脂肪族/芳香族环氧化物与各种各样的胺下的无溶剂的条件（ scheme1 ） .
最初,开环苯乙烯氧化物与苯胺被选定为示范和作用,各种溶剂
和催化剂对反应体系进行调查.溶剂,例如水,甲苯,四氢呋喃,甲基
二氯二,和甲醇（表1 ,参赛作品1月5日）提供的产量低所期望的产品（ 5-12 ％ ） ,而
同样的反应下的无溶剂条件,提供了92 ％ ,产量在1小时.高反应速率观察
原因可能是事实,即根据的无溶剂条件下,催化剂浓度是更大的领导,以
率的提高相比,同样的反应,在在场的溶剂.此外,影响各种金属
硝酸盐对反应系统研究（表1 ,参赛作品6月11日） .Y （下硝酸） 36h2o和La （硝酸） 36h2o提供
良好的收益率所期望的产品在很短的反应时间（ 1小时） .但是,由于Y （下硝酸） 36h2o给予高区域
对重大的同分异构体（ 2 -表3开环的环氧化合物与杂环aminesa苯胺- 2 -苯乙醇） ,它被用来作进一步研究..