Oxidative Se‐catalyzed C(sp3)H bond acyloxylation has been used to construct a diverse array of isobenzofuranones from simple ortho‐allyl benzoic acid derivatives. The synthetic procedure employs mild reaction conditions and gives high chemoselectivity enabled by an inexpensive organodiselane catalyst. The presented approach offers a new synthetic pathway toward the core structures of phthalide natural
4-chloropicolinamide is described. The desired compounds were formed by reactions of methyl 4-chloropicolinohydrazonamide or 4-chloro-N'-methylpicolinohydrazonamide with suitable counter partners (carbon disulfide, alkyl halides, aldehydes, ketones, carbohydrazonamides or isothiocyanates) or via 4-chloropicolinimidate, obtained by a convenient method from nitrile with catalytic amount of DBU. Selected products were screened for bacteriostatic and tuberculostatic activity. Synthesis of 4-chloropicolinamidrazone derivatives starting from
Synthesis and Antimicrobial Activity of Novel Heterocyclic Sulfamoyl-phenyl-carboximidamides Derived from Clinically Applied Sulfonamides
A series of novel heterocyclic sulfamoyl‐phenyl‐carboximidamides were synthesized in satisfactory yields via condensation of clinically applied sulfonamides with heterocyclic methyl carbimidates. New structures were confirmed by IR and NMR spectra as well as elemental analyses. All the compounds were screened for their antibacterial, antifungal, and tuberculostatic activities. Preliminary results indicated
通过临床应用的磺酰胺与杂环甲基碳酰亚胺酯的缩合,合成了一系列新型杂环氨磺酰基-苯基-羧酰亚胺酰胺,收率令人满意。新结构通过 IR 和 NMR 光谱以及元素分析得到证实。筛选了所有化合物的抗菌、抗真菌和抗结核活性。初步结果表明,一些目标化合物表现出良好的抗菌效力。特别是,发现 N-[4-(噻唑-2-氨磺酰基)苯基]吡嗪-2-羧酰亚胺酰胺 (16) 与临床应用的磺胺甲氧哒嗪一样有效。
Nickel-catalyzed reductive allylation of aryl bromides with allylic acetates
作者:Xiaozhan Cui、Shulin Wang、Yuwei Zhang、Wei Deng、Qun Qian、Hegui Gong
DOI:10.1039/c3ob40232k
日期:——
This paper highlights Ni-catalyzed allylation of electron-rich aryl bromides with a variety of substituted allyliccarbonates using zinc as the terminal reductant, affording E-alkenes regioselectively in good to excellent yields by the addition of aryl to the less hindered allylic carbon. The electron-deficient aryl bromides and chlorides are also highly efficient coupling partners.