1.Application of samarium diiodide in mediating intramolecular cyclization reactions was reviewed.
二碘化钐在分子内环化反应中的应用。
2.Conversion of the linear molecule to γ-valerolactone proceeds via hydrogenation and subsequent intramolecular cyclization with elimination of a water molecule.
因此若能进一步改进催化体系，用这种方法来制造汽油有可能是可行的。
3.Levocetirizine Dihydrochloride was prepared from benzoyl chloride by acidylation,hydrogenation,cyclization with an overall yield of 8.05%.
以苯甲酰氯为原料,经酰化,还原,环合等反应合成左旋西替利嗪盐酸盐,反应总收率为8.05%。
4.This paper reports the improvement on the synthesis of 5 methylisoxazol 3 formamide by Claisen condensation of diethyl oxalacetate followed by cyclization and ammonolysis.
讨论以草酸二酯为原料,经过克莱森缩合、环合、氨解反应合成5甲基异唑3甲酰胺工艺的改进。
5.By nucleophilic addition and reductive cyclization reaction of the three intermediates, respectively, some azo-heterocyclic derivatives containing a rosinyl skeleton were obtained.
该3个中间体分别经过亲核取、还原关环反应后，得到一些脱氢松香酸甲酯含氮杂环衍生物；
6.Bromacil was synthesized using 2-bromobutane and urea as the starting materials in three steps including condensation,cyclization and bromination with total yield of 61%.
以2-丁烷和尿素作为起始原料,经缩合、环化、步反应得到除草定,总收率为61%。
7.Based on 3,6-dichloropyridazine, imidazo〔1,2-b〕pyridazine was synthesized via amination, cyclization and dechlorination.
以3,6-二氯哒嗪为原料,经氨化、环合、脱氯得咪唑并〔1,2-b〕哒嗪。
8.Cyanoguanidine and acetylated β-D-ribose were used as starting materials to give target compound via salt formation, cyclization, silylation, coupling reaction and deprotection.
9.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.
10.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.
二碘化钐在分子内环化反应中的应用。
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酯为原料,经过克莱森缩合、环合、氨解反应合成5甲基异唑3甲酰胺工艺的改进。
、还原关环反应后，得到
丁烷和尿素作为起始原料,经缩合、环化、
步反应得到除草定,总收率为61%。
