Antibacterial N-[.omega.,.omega.'-bis(alicyclic and aryl)-sec-alkyl]poly(methylenetriamine and -tetramine) hydrochloride salts
摘要:
A series of antibacterial N-(omega, omega'-(cycloalkyl, bicyclo[2.2.1]heptyl, and alkyl-substituted phenyl)-sec-alkyl]poly(methylene)triamine and -tetramine hydrochloride salts were synthesized in an effort to develop efficient, nonsystemic inhibitors, particularly for Pseudomonas aeruginosa. In the 1,5,9-triazanonane group, 3 of 16 compounds were effective at 8--10 micrograms/mL against pseudomonads. Efficiency appeared more dependent upon lipophilicity of the nitrogen substituent than other characteristics represented by the three types of rings. A parabolic relationship was observed for the entire set between the hydrophobic parameter, pi, of the lipoidal moiety and minimal inhibitory concentration. One of 16 tetramines, 1-[1,5-bis(3,3-dimethyl-2-norbornyl)-3-pentyl]-1,5,9,13-tetraazatridecane tetrahydrochloride (26f), ranked similarly. An additional two compounds in each series were superior to several commercial cationic detergents in the control of the Gram-negative bacteria. None was inhibitory at up to 200 micrograms/mL for Proteus vulgaris.
Highly Enantioselective Synthesis of Spiro[cyclohexanone-oxindoles] and Spiro[cyclohexanone-pyrazolones] by Asymmetric Cascade [5+1] Double Michael Reactions
作者:Bin Wu、Jian Chen、Mei-Qiu Li、Jin-Xin Zhang、Xiao-Ping Xu、Shun-Jun Ji、Xing-Wang Wang
DOI:10.1002/ejoc.201101529
日期:2012.3
The asymmetric catalytic synthesis of naturally occurring and biologically active spiro compounds is a challenge for modern chemical methodology. Here we report the construction of spiro compounds through cascade [5+1] double Michael reactions between divinyl ketones and N-unprotectedoxindoles or N-phenyl-protected pyrazolones catalyzed by a combination of the easily available 9-amino-9-deoxy-epi-quinine
Efficient synthesis of optically active 4-nitro-cyclohexanones via bifunctional thiourea-base catalyzed double-Michael addition of nitromethane to dienones
作者:Bin Wu、Guo-Gui Liu、Mei-Qiu Li、Yong Zhang、Shao-Yun Zhang、Jun-Ru Qiu、Xiao-Ping Xu、Shun-Jun Ji、Xing-Wang Wang
DOI:10.1039/c0cc05418f
日期:——
Thiourea-modified cinchona alkaloids as bifunctional catalysts and a base could catalyze a stepwise [5+1] cyclization of divinyl ketones with nitromethane via double Michael additions, furnishing optically active 4-nitro-cyclohexanones with good yields, excellent diastereoselectivities (>20 : 1) and high enantiomeric ratios (up to 97 : 3).
Tri(<i>n</i>-butyl)phosphine-promoted domino reaction for the efficient construction of spiro[cyclohexane-1,3'-indolines] and spiro[indoline-3,2'-furan-3',3''-indolines]
作者:Hui Zheng、Ying Han、Jing Sun、Chao-Guo Yan
DOI:10.3762/bjoc.18.68
日期:——
tri(n-butyl)phosphine-catalyzed reaction of isatylidene malononitriles and bis-chalcones in chloroform at 65 °C afforded functionalized spiro[cyclohexane-1,3'-indolines] in good yields and with good diastereoselectivity. On the other hand, the tri(n-butyl)phosphine-catalyzed reaction of 3-(ethoxycarbonylmethylene)oxindoles and bis-chalcones gave functionalized spiro[cyclohexane-1,3'-indolines] with
三(正丁基)膦催化的异亚甲基丙二腈和双查耳酮在氯仿中在 65 °C 下的反应以良好的收率和良好的非对映选择性提供了官能化的螺[环己烷-1,3'-二氢吲哚]。另一方面,三(正丁基)膦催化的3-(乙氧基羰基亚甲基)吲哚和双查耳酮反应得到了具有不同区域选择性的功能化螺[环己烷-1,3'-二氢吲哚]。此外,三(正丁基)膦促进的多米诺环化反应的靛红和乙基异亚甲基氰基乙酸酯以令人满意的产率产生螺[indoline-3,2'-furan-3',3''-indolines]。
Vorlaender; Hayakawa, Chemische Berichte, 1903, vol. 36, p. 3545
作者:Vorlaender、Hayakawa
DOI:——
日期:——
Claisen; Ponder, Justus Liebigs Annalen der Chemie, 1884, vol. 223, p. 147