1) 5-dipolar cyclization
5-偶极环化
2) Dipolarization
偶极化
1.
Dipolarization observed by TC1 and ClusterII during substorm in Sep. 14, 2004;
一次磁层亚暴期间磁场偶极化的尾向传播
3) dipole prolarization
偶极子极化
4) dipolar cycloaddition
偶极环加成
1.
A series of heterospiro compounds were synthsized by 1,3 dipolar cycloaddition of nitrile oxides to 4,4 methylene 1 methylpiperidine.
氧化腈与4,4-亚甲基-1-甲基哌啶的1,3-偶极环加成反应生成了杂螺[4。
2.
Condensation of diamine with quinoxaline-2-carboxaldehyde or 2-phenyl-1,2,3-triazole-4-carboxa-ldehyde gave a series of new bis-Schiff bases,which then were reacted with mercaptoacetic acid to afford bis-thiazolidinone derivatives by 1,3-dipolar cycloaddition.
以喹喔啉-2-甲醛或2-苯基-1,2,3-三唑基-4-甲醛为原料与二胺缩合制备了一系列新的双席夫碱,再分别与巯基乙酸进行1,3-偶极环加成反应得到双-噻唑啉酮衍生物,其组成及结构经元素分析、IR和1HNMR、MS测试技术得以确证。
5) coupling-cyclization
环化偶联
1.
Fifteen N-phenyl and N-ethoxycarbonylmethyl phosphaisoquinolin-1-ones and their 4-allyl, 4-chloro derivatives were synthesized by Pd(II)-catalyzed cyclization, coupling-cyclization and halocyclization reactions.
以邻炔基苯磷酰胺为原料经Pd(II)催化的环化反应、环化偶联反应和氯环化反应高收率合成了15个N-苯基和N-乙氧羰基甲基磷异喹啉酮及其4-烯丙基、4-氯衍生物,它们的结构均经过1HNMR,13CNMR,MS,IR及元素分析确证。
6) Dipole-enhanced
强化偶极子
补充资料:“质子-电子偶极-偶极”质子弛豫增强
“质子-电子偶极-偶极”质子弛豫增强
物理学术语。原子核外层中不成对的电子质量小,但磁动性很强,可使局部磁场波动增强,促使氢质子弛豫加快,从而使T1和T2缩短,这种效应即为PEDDPRE。过渡元素和镧系元素大部分在d和f轨道有多个不成对电子,所以其离子往往具有PEDDPRE,可用来作顺磁性对比剂,如钆(Gd)。Gd在外层有7个不成对电子,具有很强的顺磁性。
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