共查询到18条相似文献,搜索用时 109 毫秒
1.
2.
3.
5-单烃基取代的丙二酸亚异丙酯是重要的有机合成中间体[1],由于它的活性亚甲基具有较强的酸性(pKa=4.75),用卤代烃直接烃化时,往往生成5,5-双取代产物[2,3],所以一般用间接方法合成5-单取代丙二酸亚异丙酯[4~6],其中以丙二酸亚异丙酯与羰基化合物缩合成亚烃基丙二酸亚异丙酯,继而还原的两步法最为普遍,常用的还原方法和还原剂有催化氢化、氢化铝锂,硼氢化钠等[6]。 相似文献
4.
5-烃基丙二酸亚异丙酯的Mannich碱和甲基酮在弱酸如醋酸的存在下, 合成得到缩合产物5-(3-氧代烃基)丙二酸亚异丙酯(3). 相似文献
5.
6.
7.
本文报道了一种用紫外分光光度法测定丙二酸亚异丙酯类化合物中烯醇含量的方法。用该法测得的烯醇含量与弛豫测定法所得到的结果近似。此外,应用该法还测定了三种α-烃基取代丙二酸亚异丙酯的烯醇含量。 相似文献
8.
本文利用2-氨基喹啉和2-氨基苯骈咪唑作为亲核试剂,与5-(双甲硫基亚甲基)丙二酸亚异丙酯(1)、5-(甲硫基亚烃基)丙二酸亚异丙酯(3)反应,开发出3-取代-(1H)-嘧啶-[1,2-a]喹啉-1-酮(5)和2-取代嘧啶[1,2-a]苯骈咪唑-4-(10H)-酮(6)通用的简便合成法。 相似文献
9.
10.
首次报道利用丙二酸亚异丙酯钠盐与γ-丁内酯类化合物反应,制备β-酮酯类衍生物。以(S)-(+)-谷氨酸为起始物经重氮化、环合,加成开环及酯化等反应,成功地合成了(S)-(+)-6,7-丙酮缩二醇-3-酮-庚酸乙酯。化合物(1)、(5)、(6)未见文献报道。 相似文献
11.
12.
Francisco Yuste Francisco Kuri Breña Héctor Barrios Rubén Sánchez-Obregón Benjamín Ortíz Fernando Walls 《合成通讯》2013,43(7):735-739
A simple and efficient method to prepare alkyl 3,5-dioxohexanoates by alcoholysis of isopropylidene (1-hydroxy-3-oxo-butylidene) malonate is described. 相似文献
13.
Nandkishor N. Karade Sumeet V. Gampawar Jeevan M. Kondre Sandeep V. Shinde 《Tetrahedron letters》2008,49(28):4402-4404
A novel one-pot procedure for the synthesis of 3-carbomethoxy-4-aryl furan-2-(5H)-ones is reported via α-tosyloxylation of enolisable ketones with [hydroxy(tosyloxy)iodo]benzene, followed by treatment with potassium monomethyl malonate and K2CO3. 相似文献
14.
15.
Condensation of malononitrile, ethyl cyanacetate and isopropylidene malonate with various O-ethyl cyclic carbamates leads to α-(tetrahydrox- azole-1.3-ylidene-2) and α-(tetrahydroxazine-l,3-ylidene-2)malono- nitriles, ethyl cyanacetates and isopropylidene malonates. 相似文献
16.
微波辐射下芳醛与活性亚甲基化合物的反应 总被引:5,自引:0,他引:5
芳醛、5,5-二甲基-1,3-环己二酮、丙二酸亚异丙酯经微波辐射发生缩合、加成、环化及消去反应,一步合成了7,7-二甲基-4-芳基-2,5-二氧代-1,2,3,4,5,6,7,8-八氢喹啉和7,7-二甲基-4-芳基-5-氧代-3,4,5,6,7,8-六氢香豆素,反应在3-5min内完成,产率优良。产物的结构经红外及核磁共振等方法确证。 相似文献
17.
Strods Ya. A. Kampare R. B. Lielbriedis I. é. Neiland O. Ya. 《Chemistry of Heterocyclic Compounds》1977,13(7):788-791
It is shown that 4-aryl-2-oxo-1,2,3,4-tetrahydro-5,6-benzoquinolines are formed in the reaction of N-arylidene-2-naphthylamines with isopropylidene malonate. The reaction takes place with cleavage of the isopropylidene malonate ring and the production of carbon dioxide and acetone. The structure of the benzotetrahydroquinolines obtained were confirmed by identification of the compound obtained by sulfur dehydrogenation of the product of the reaction of isopropylidene malonate with arylidenenaphthylamine (aryl=phenyl) with an authentic sample of 1,2-dihydro-2-oxo-4-phenyl-5,6-benzoquinoline and of the reaction product (in which the aryl group was absent) with an authentic sample of 2-oxo-1,2,3,4-tetrahydro-5,6-benzoquinoline. The IR and PMR spectra data are presented.Translated from Khimiya Geterotsiklicheskikh Soedinenii, No. 7, pp. 973–976, July, 1977. 相似文献
18.
An efficient and mild one-pot synthesis of substituted 5-alkylamino and/or 5-(arylamino)pyrazoles is described. A suitably decorated β-ketoamide, an aryl or alkyl hydrazine and Lawesson's reagent are suspended in THF/Py and gently heated to yield the requisite 5-aminopyrazoles. 相似文献