1) Darzens condensation
Darzens缩合
1.
Synthesis of 2,3-epoxy-l-phenyl-3-(un)substituted phenyl-1-propanone via Darzens condensation of (un)substituted benzaldehydes with phenacyl chloride was carried out in good yields in the aqueous sodium hydroxide solution under ultrasound irradiation.
在氢氧化钠水溶液中,通过氯代苯乙酮和芳香醛进行Darzens缩合反应,在超声辐射下,合成了系列2,3-环氧- 1,3-二芳基丙酮;应用超声和相转移催化剂联用的方法进行改进,取得良好效果。
2.
Darzens condensation of aromatic aldehydes with ω-bromoacetophenone in aqueous chiral micelles formed from the chiral surfactants, N-dodecyl-N,N-dodecyl-N,N-dimethyl ephedrine ( I a) and N-hex-adecyl-N, N-dimethyl ephedrine bromide ( I b), afforded the corresponding epoxyketones with enan-tiomeric excess up to 11.
本文报道ω-溴代苯乙酮与各种芳醛在手性表面活性剂N,N-二甲基-N-十二烷基麻黄素溴化铵及N,N-二甲基-N-十六烷基麻黄素溴化铵形成的手性胶束水溶液中的不对称Darzens缩合反应,得到手性α,β-环氧酮,对映体过量值最高达11。
3.
Methods The target compound was synthesized from 3 benzylacetophenone via Darzens condensation and oxidation.
方法以 3 苄基苯乙酮为原料 ,通过Darzens缩合 ,氧化合成目标物。
2) Darzens reaction
Darzens反应
1.
Research progresses of phase transfer catalysts used in Darzens reaction;
相转移催化Darzens反应的研究进展
2.
The application of Darzens reaction in synthesis of perfume is described in detail.
本文简述了Darzens反应及其反应机理,并详细介绍了Darzens反应在香料合成上的应用。
3) condensation reaction
缩合
1.
A monomer of polyimide 2,2′-bis[4-(3-aminophenoxy)phenyl]propane was prepared from m-dinitrobenzene and bisphenol A through condensation reaction and hydrazine hydrate reduction with an overall yield of 85.
提出了以间二硝基苯和双酚A为原料经缩合和水合肼催化还原合成聚酰亚胺的单体2,2′-双[4-(3-氨基苯氧基)苯基]丙烷的新工艺,考察了各类工艺条件对目标产物收率的影响,得到最适宜反应条件,在优化条件下,总收率为85。
2.
This paper researched the condensation reaction of 2-metylbenzimidazole and 2-methylbenzothio-zole with aromatic aldehyde in acetic anhydride to form 2-(benzimidazol-2-yl)-1-aryl-ethylene derivatives or 2-(benzothiozol-2-yl)-1-aryl-ethylene derivatives.
本文研究了2-甲基苯并咪唑和2-甲基苯并噻唑衍生物,在乙酸酐中与芳香醛缩合形成2-(2-苯并咪唑基)-1-芳基乙烯类或2-(2-苯并噻唑基)-1-芳基乙烯类化合物。
3.
The experiments show that the condensation reaction doesn't take place without ultrasonic irradiation, otherwise with ultrasonic irriation the reaction not phly occurs in ordinary condition but also good result was obtained.
本文采用超声辐射法合成了N—苯基间氯苯胺,考察了反应条件对缩合反应的影响。
4) condensation
[英][,kɔnden'seɪʃn] [美]['kɑndɛn'seʃən]
缩合
1.
The application of 1,3-dicyclohexylcarbodiimide(DCC) used as condensation agent in organic synthesis;
缩合剂1,3-二环己基碳二亚胺(DCC)在有机合成中的应用
2.
Condensation of Benzaldehyde and Methanol Catalyzed by Niobic Acid;
铌酸催化的苯甲醛与甲醇缩合反应
3.
Effect of solvent on diazinon condensation;
溶剂对二嗪磷缩合过程的影响
6) condensation polymerization
缩合聚合
1.
Chemical synthesis methods(condensation polymerization and ring-opening polymerization), structures and properties of poly(lactic acid), especial poly(L-lactic acid) in rencent years are briefly reviewed.
简述了近年来聚乳酸(PLA)尤其是聚左旋乳酸(PLLA)的化学合成方法(缩合聚合和开环聚合)及其结构与性能,并对这类材料的应用和发展作了展望。
2.
In this paper the equilibrium process of closed system and the equilibrium move of opened system in condensation polymerization were investigated.
研究了缩合聚合反应封闭体系的平衡过程和开放体系的平衡移动 ,研究了小分子放出对平衡移动的驱动作用 ,探讨了这种驱动作用的热力学意义 ,提出了自由能守恒的概念 。
3.
The PF resins were prepared by condensation polymerization,and the magnetic PF microspheres are synthesized by codeposition.
运用缩合聚合法制备出PF凝胶,并在此基础上以共沉淀法合成出磁性PF微球。
补充资料：Darzens’reaction
分子式：
CAS号：
性质： 醛酮在碱的作用下与α-卤代酯缩合形成缩水甘油酸酯，称为达曾斯反应，它广泛被应用于有机合成中：式中的R′，R″可以是烷基、芳基或杂环基；R′″可以是脂肪烃基或芳基。
CAS号：
性质： 醛酮在碱的作用下与α-卤代酯缩合形成缩水甘油酸酯，称为达曾斯反应，它广泛被应用于有机合成中：式中的R′，R″可以是烷基、芳基或杂环基；R′″可以是脂肪烃基或芳基。
说明：补充资料仅用于学习参考，请勿用于其它任何用途。
参考词条