‘On water’ direct vinylogous Henry (nitroaldol) reactions of 3,5-dimethyl-4-nitroisoxazole with aldehydes and trifluoromethyl ketones
作者:Yong Zhang、Biao-Wen Wei、Li-Na Zou、Mei-Lian Kang、Hai-Qing Luo、Xiao-Lin Fan
DOI:10.1016/j.tet.2016.03.072
日期:2016.5
An efficient ‘on water’-promoted direct catalytic vinylogous addition of 3,5-dimethyl-4-nitroisoxazole to aldehydes and trifluoromethyl ketones was described, giving Henry (nitroaldol) adducts in excellent yields. The trifluoromethyl tertiary alcohol product could be transformed to the corresponding styrene derivative, which was demonstrated as a new type of Michael acceptor in the vinylogous 1,6-Michael
A simple and efficient iodine-promoted synthesis has been developed for the synthesis of isoxazolyl aryl thiazole amines (3) from easily available isoxazolyl aryl ethanones (1) and thiourea (2) in good yields. Furthermore, isoxazolyl aryl thiazole amines (3) are utilized as building blocks for the synthesis of novel isoxazolyl imidazo[2,1-b]thiazole libraries 6. All the synthesized compounds were characterized
已经开发了一种简单有效的碘促进合成方法,用于从容易获得的异恶唑基芳基乙酮 ( 1 ) 和硫脲 ( 2 ) 以良好的收率合成异恶唑基芳基噻唑胺 ( 3 )。此外,异恶唑基芳基噻唑胺 ( 3 ) 被用作合成新型异恶唑基咪唑并[2,1- b ]噻唑库6的构件。所有合成的化合物均通过 IR、1 H NMR、13 C NMR 和质谱数据进行了表征。评价了标题化合物6a-ah的抗微生物活性。化合物6d、6g、6p、6q、6r、6 s、6u、6v、6w和6x表现出与标准药物一样的显着抗菌活性。
Vinylogous nitroaldol (Henry) reaction using 3,5-diethyl-4-nitroisoxazole and carbonyl compounds
作者:Mauro F.A. Adamo、Surisetti Suresh
DOI:10.1016/j.tet.2008.11.089
日期:2009.1
3,5-Diethyl-4-nitroisoxazole reacted with carbonyl compounds in the presence of an amine catalyst. The vinylogous nitroaldol adducts were isolated in good yields. (C) 2008 Elsevier Ltd. All rights reserved.
Environmentally benign synthesis, molecular properties prediction and anti-inflammatory activity of novel isoxazolo[5,4-d]isoxazol-3-yl-aryl-methanones via vinylogous Henry nitroaldol adducts as synthons
Synthesis of novel 6-methylisoxazolo[5,4-d]isoxazol-3-yl-aryl-methanones 5 has been achieved via nitro-nitrite rearrangement by utilizing vinylogous nitroaldol adducts as synthons under mild conditions. Furthermore, the new series of compounds 5a-i were assessed for molecular properties prediction, drug-likeness by Molinspiration (Molinspiration, 2008) & MolSoft (MolSoft, 2007) softwares, lipophilicity and solubility parameters using ALOGPS 2.1 program. The new series of compounds 5a-i were screened for their anti-inflammatory activity. (C) 2015 Elsevier Ltd. All rights reserved.