首页 | 本学科首页   官方微博 | 高级检索  
相似文献
 共查询到20条相似文献,搜索用时 15 毫秒
1.
2.
3.
4.
5.
6.
7.
Summary The total syntheses of a- and 0-kamlolenic acids were carried out.Communication 7 of the series Stereoregular synthesis of unsaturated compounds.Translated from Izvestiya Akademii Nauk SSSR, Seriya Khimicheskaya No. 11, pp. 2003–2007, November, 1964  相似文献   

8.
9.
10.
11.
Summary With the aid of a stereospecific modification of the Wittig reaction a new way of building up cis-cis 1,5-hexadiene systems was developed.Communication 6 of the Series Stereoregular Synthesis of Unsaturated Compounds. For preceding communication see [13].Translated from Izvestiya Akademii Nauk SSSR, Seriya Khimicheskaya, No. 8 pp. 1453–1456, August, 1964  相似文献   

12.
New, biologically active pyrazole derivatives containing an unsaturated -lactone ring were obtained by condensation of 2-(1-etboxycarbonyl-1,3-diketopropyl)-2-buten-4-olides with phenylhydrazine and hydrazine hydrate. A number of transformations of the resulting pyrazole-3-carboxylic acid esters were realized.See [1] for communication XXXIV.Translated from Khimiya Geterotsiklicheskikh Soedinenii, No. 12, pp. 1611–1614, December, 1978.  相似文献   

13.
14.
15.
16.
17.
New macrocyclic lactones were synthesized by reaction of 3-bromo-5-(5-tert-butyl-2-hydroxybenzyl)biphenyl-4-ol with appropriate polyethylene glycol-based dicarboxylic acid dichlorides, and their complexes with Mg(ClO4)2·6H2O, Pb(SCN)2, NaClO4·H2O, and KClO4 were prepared. The macrocyclic ligands were evaluated as extractants in the transfer of Li+, Na+, K+, Cu2+, Ni2+, and Hg2+ picrates from aqueous to organic phase. Published in Russian in Zhurnal Organicheskoi Khimii, 2008, Vol. 44, No. 9, pp. 1400–1405. The text was submitted by the authors in English.  相似文献   

18.
Two representative macrocyclic lactones with methoxysulfonyl side chain(5a and 5b)were synthesized employing Michael addition with acrolein and ring enlargement as the key steps,starting from potassium,α-oxocycloaikylsulfonates(1)in total yields of 45 and 57%,respectively.  相似文献   

19.
A general method has been developed for the preparation of 14-remembered cyclic lactams, lactones, and thiolactones from heteroaromatic amino acids.A. V. Bogatskii Physico-Chemical Institute, Ukraine Academy of Sciences, Odessa 270080. Translated from Khimiya Geterotsiklicheskikh Soedinenii, No. 8, pp. 1128–1131, August, 1996. Original article submitted May 27, 1996.  相似文献   

20.
《Tetrahedron letters》1987,28(7):805-808
A new method for the preparation of macrocyclic lactones from ω-hydroxyacid methyl esters is described. The approach utilizes intramolecular transesterification catalyzed by lipase in organic solvents. This procedure is also applicable to the synthesis of asymmetric lactones.  相似文献   

设为首页 | 免责声明 | 关于勤云 | 加入收藏

Copyright©北京勤云科技发展有限公司  京ICP备09084417号