Synthesis of Thioalkyne-Substituted Thiazolidine-2-thiones Using Tris(trimethylsilyl)methyllithium and Carbon Disulfide
作者:Kazem Safa、Maryam Alyari
DOI:10.1055/s-0034-1379253
日期:——
simple one-pot approach to the synthesis of 5-(iodomethyl)thiazolidine-2-thiones via multicomponent reaction of allylamines, carbon disulfide, and iodine under solvent-free conditions is presented. The obtained 5-(iodomethyl)thiazolidine-2-thiones were converted into silyl-protected terminal [(ethynylthio)methyl]-substituted thiazolidine-2-thiones by treatment with lithium 2,2,2-tris(trimethylsilyl)ethanedithioate
Wagner–Meerwein rearrangement in 2,6a-epoxyoxireno[e]isoindole series
作者:Vladimir P. Zaytsev、Fedor I. Zubkov、Maryana A. Nadirova、Dmitriy F. Mertsalov、Eugeniya V. Nikitina、Roman A. Novikov、Alexey V. Varlamov
DOI:10.1007/s10593-016-1957-9
日期:2016.9
A cation-catalyzed Wagner–Meerwein skeletal rearrangement in octahydro-2,6a-epoxyoxireno[e]isoindole series was studied. It was shown that the reaction proceeds ambiguously when effected by boron trifluoride etherate in acetic anhydride: the target 4,5-bis(acetoxy)-4,6-epoxycyclopenta[c]pyridines as well as the products of their further degradation, cyclopenta[c]pyridines, were isolated from the reaction
研究了在八氢-2,6a-环氧肟基[ e ]异吲哚系列中阳离子催化的瓦格纳-梅尔温骨架重排。结果表明,当三氟化硼醚化物在乙酸酐中进行反应时,反应会模棱两可:目标4,5-双(乙酰氧基)-4,6-环氧环戊[ c ]吡啶及其进一步降解的产物环戊[以单一非对映异构体的形式从反应混合物中分离出c ]吡啶,产率为10%至15%。
The short route to chalcogenurea-substituted 3a,6-epoxyisoindoles via an intramolecular Diels–Alder furan (IMDAF) reaction. Antibacterial and antifungal activity
作者:Dmitriy F. Mertsalov、Dmitriy M. Shchevnikov、Lala V. Lovtsevich、Roman A. Novikov、Victor N. Khrustalev、Mikhail S. Grigoriev、Anna A. Romanycheva、Anton A. Shetnev、Olga P. Bychkova、Alexey S. Trenin、Vladimir P. Zaytsev
DOI:10.1039/d4nj01174k
日期:——
sequence involves two consecutive steps: the nucleophilic addition reaction and the intramolecular Diels–Alder furane (IMDAF) reaction. The scope and limitations of the proposed method were thoroughly investigated, and it was revealed that the key [4+2] cycloaddition step proceeds through an exo-transition state, giving rise to the exclusive formation of a single diastereomer of the target heterocycle
N-糠基烯丙胺与多种异氰酸酯、异硫氰酸酯、异硒氰酸酯反应,在一个合成阶段形成 3a,6-环氧异吲哚核心。相互作用序列涉及两个连续的步骤:亲核加成反应和分子内狄尔斯-阿尔德呋喃(IMDAF)反应。对所提出方法的范围和局限性进行了彻底研究,结果表明关键的[4+2]环加成步骤通过外过渡态进行,导致目标杂环的单一非对映异构体的排他性形成。动态温度 NMR 分析可以全面研究 NMR 信号聚结的情况,并确定 O → Se 转变过程中的聚结温度。鉴定了所获得的化合物对酵母白色念珠菌、真菌黑曲霉和细菌(包括金黄色葡萄球菌、藤黄微球菌、荧光假单胞菌)敏感菌株的抗菌特性。