查询词典 pyrazoline

Four chalcones were synthesized by aldol condensation reaction of acetophenone or para-substituted acetophenones with 2-phenyl-1,2,3-triazol-4-carboxaldehyde, which reacted with three hydrazines in glacial acetic acid under refluxing to give a series of pyrazoline derivatives.

以2-苯基－1，2，3-三唑基－4-甲醛为原料，与苯乙酮［或取代苯乙酮(1a~1d)］发生羟醛缩合，生成相应的查尔酮(2a~2d)，再与不同的肼反应，合成了12种新的5位含2-苯基－1，2，3-三唑基的吡唑啉衍生物3a~3d，4a~4d，5a~5d。

Eight complexes of light rare earths with dioctyldithiocarbamate,〓 xH〓O (RE=La-Tb, except for Pm) and Nine complexes of rare earths with 5-phenyl pyrazoline dithioformate, Na RE〓·xH〓O (RE=La-Dy, Y, except for Ce and Pm) have been synthesized in air and dry N〓atmosphere, respectively.

分别在空气和氮气保护条件下，合成出八种稀土与二正辛基二硫代氨基甲酸形成的配合物〓（RE=La-Tb，除Pm外）和九种稀土与5-苯基吡唑啉二硫代甲酸的固态配合物NaRE〓（La—Dy、Y、除Ce、Pm外）。

Firstly, phenyliodine diacetate was immobilized to the 2% cross-linked polystyrene or the liner polystyrene resin. The more iodine the resin had, the lower conversion to phenyliodine diacetate. We made our endeavor to extend the range of useful application of polystyrene supported phenyliodine diacetate in organic synthesis:(1) the reagent was used as an effective reagent of carbonyl regeneration from oximes and semicarbazones of ketones.(2) the reagent was also applied to the synthesis of 1, 3, 4-oxadiazoles, 1, 3-disubstituted-2-pyrazoline, 2-arylbenzoxazole from aldehyde N-acylhydrazones, aldehyde hydoazones and phenolic Schiff's bases respectively.

首先，我们以2％交联的聚苯乙烯和线性的聚苯乙烯树脂为载体，制备了聚合物负载的二醋酸碘苯，通过研究发现：(1)聚苯乙烯二醋酸碘苯是酮肟、缩氨脲有效的去保护试剂，不仅芳香酮，脂肪酮和α，β不饱和酮的肟、缩氨脲也能顺利转化为相应的酮，实现酮基的再生；(2)我们还利用此试剂，分别与醛的N-酰基苯、N-酰基苯腙及邻羟基芳亚胺反应，在温和的条件下发生成环反应，以良好的产率生成1，3，4-噁二唑、吡唑啉和二取代苯并噁唑等杂环化合物；(3)聚苯乙烯二醋酸碘苯还可有效地将邻羟基芳酮的酰腙经氧化、重排成1，2-二酰基苯。

For a big chunk of credit-card losses; the number of filings (and thus charge-off rates) would be rising again, whether

年美国个人破产法的一个改动使得破产登记急速下降，而后引起了信用卡大规模的亏损。

Eph. 4:23 And that you be renewed in the spirit of your mind

弗四23 而在你们心思的灵里得以更新