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

以苯为原料,经化,还原,环等反左旋西替利嗪盐酸盐,反总收率为8.05%。

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

综述了二碘化钐在分子内环化反中的用。

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

方法以克拉霉素为起始原料,经水解、乙化、环酸酯化、氧化、脱酸酯化、化、环氨基酸酯化和环等反目标化物。

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.

以邻苯酸和对乙氧基苯胺为原料,经过胺的苯基化、二芳胺的环化、N-烷基化、硫代化反了N-丁基-2-乙氧基硫代吖啶酮。

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

讨论了以草酸二乙酯为原料,经过克莱森缩、环、氨解反5基异唑3胺工艺的改进。

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

以苯酐和取代苯为原料,经过乙化、水解及环反,了2-蒽醌和2-氨基蒽醌,并对影响收率的工艺条件进行了研究。

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.

本文研究了三化钛水溶液作用下,邻硝基苯胺与1,2-二酮在碱性介质中分子间的环反,提供了一个方便地取代喹喔啉类化物的方法。