Theoretical investigation of the stereoselectivity of some Diels-Alder reactions involving cyclopent

来源 :中国化学快报(英文版) | 被引量 : 0次 | 上传用户:lanrengbuluo
下载到本地 , 更方便阅读
声明 : 本文档内容版权归属内容提供方 , 如果您对本文有版权争议 , 可与客服联系进行内容授权或下架
论文部分内容阅读
The stereoselectivity of some Diels-Alder reactions was investigated by means of ABEEM-oπ model. Combined with local hard-soft and acid-base (HSAB) principle, we made reasonable explanation by calculating local softness of atom and bond regions for the stereoselectivity of four Diels-Alder reactions involving cyclopentadiene.
其他文献
A novel benzo [1,5] oxazepin-4-one skeleton compound and its four derivatives were synthesized effectively from 1,5-difluoro-2,4-dinitrobenzene (DFDNB) under mi
The insertion reaction mechanism of CF2 with CH2O was investigated at the B3LYP/6-311G(d)//MP2/6-311G(d) level.The geometric conformations at each stationary po
园林景观工程在城市化建设过程中可以很好的反映城市的精神面貌,人们对其外观和品质有了很大的关注度。所以,本文就当下国内园林施工过程中所存在的问题进行了分析,与此同时,根据
文艺复兴是指十四五世纪在意大利各城市兴起,以后扩展到西欧各国,揭开了近代欧洲历史的序幕,女性也不是完全沉默的阶级,社会地位提高,也得到了更多的教育.
十四世纪的欧洲风起云涌,无论是农业、工业还是其他方面都出现了翻天覆地的变化但是文化层面却依然落后,一场声势浩大的文化巨变呼之欲出.这场伟大的变革就是文艺复兴它首先
在质量分数为1.0%的HF溶液中,对纯钛片进行阳极氧化,获得了TiO2纳米管(TNTs)阵列。采用扫描电镜和X射线衍射表征了TNTs阵列的表面形貌及晶型结构。在450°C下热处理可以使TNT
In this research, an unusually dimeric G-quadruplex of d(GGGTGGGTGGGTGGGT) (Sl), the potent nanomolar HIV-1 integrase inhibitor, was detected by nuclear magneti
Arylamine N-acetyltransferases (NATs, EC 2.3.1.5) catalyze the N-acetylation of primary arylamines, and play a key role in the biotransformation and metabolism
A series of novel derivatives of 4, 5, 6, 7-tetrahydrothieno [3,2-c] pyridine were synthesized and strucmrally characterized by 1H NMR and MS. Their in vivo ant
Three novel inorganic-organic hybrid materials, [Cu(imi)2(H2O)(MoO4)]n 1, [Cu2(imi)3(MoO4)2]n·nH2O 2 and [Cu3(imi)2(OH)2(MoO4)2]n 3 (imi = imidazole), were syn