1.Application of samarium diiodide in mediating intramolecular cyclization reactions was reviewed.

1.综述了二碘钐在分子内环中的用。

2.Levocetirizine Dihydrochloride was prepared from benzoyl chloride by acidylation,hydrogenation,cyclization with an overall yield of 8.05%.

2.以苯甲酰氯为原料,经酰,还原,环合等合成左旋西替利嗪盐盐,收率为8.05%。

3.Method The target compound was synthesized from clarithromycin via hydrolyzation,acetylation,cyclic carbonatation,oxidation,decarbonatation,acylation,cyclic carbamatation and cyclization.

3.方法以克拉霉素为始原料,经水解、乙酰、环碳、氧、脱碳、酰、环氨基甲和环合等合成目标合物。

4.N butyl 2 ethoxy thioacridone was prepared from o chloro benzoic acid and p phenetidine by means of Ullman reaction,cyclization,N alkylation and sulfurization.

4.以邻氯苯甲和对乙氧基苯胺为原料,经过胺的苯基、二芳胺的环、N-烷基、硫代合成了N-丁基-2-乙氧基硫代吖啶酮。

5.This paper reports the improvement on the synthesis of 5 methylisoxazol 3 formamide by Claisen condensation of diethyl oxalacetate followed by cyclization and ammonolysis.

5.讨论了以草二乙为原料,经过克莱森缩合、环合、氨解合成5甲基异唑3甲酰胺工艺的改进。

6.In this paper, the synthesis of 2 - chloranthraquinone and 2 - aminoanthraquinone was studied.It was prepared from phthalic anhydride by acetyiation, hydrolysis and cyclization.

6.以苯酐和取代苯为原料,经过乙酰、水解及环合,合成了2-氯蒽醌和2-氨基蒽醌,并对影响收率的工艺条件进行了研究。

7.Aqueous titanium trichloride promoted intermolecular reductive cyclization of 1,2 -diketone and o-nitroaniline in basic media provides a convenient method for the synthesis of quinoxaline derivatives.

7.本文研究了三氯钛水溶液作用下,邻硝基苯胺与1,2-二酮在碱性介质中分子间的成环,提供了一个方便地合成取代喹喔啉类合物的方法。