A Convenient Synthesis of 1-Alkyl-1-phenylhydrazines fromN-Aminophthalimide
摘要:
N-Alkylaminophthalimides were synthesized by condensation of N-aminophthalimide with aldehydes, and subsequent reduction of the intermediate with pyridine-borane in acetic acid. N-Phenylation and removal of the phthalimide group gave 1-alkyl-1-phenylhydrazines in high yield.
B(C 6 F 5)3催化的氢化作用适用于带有易于去除的邻苯二甲酰基保护基的乙二肟三异丙基甲硅烷基醚和。醛衍生的底物(肟醚和as)的CN还原可通过使用1,4-二恶烷作为已知参与FLP型杂二氢裂解的路易斯碱组分的溶剂来实现。在FLP型二氢活化中,更多的碱性酮衍生的azo酮充当Lewis碱本身,因此在不给体的甲苯中成功氢化。醛和酮衍生的底物之间的反应性差异也反映在所需的催化剂负载量和二氢压力上。
applied to aldoxime triisopropylsilyl ethers and hydrazones bearing an easily removable phthaloyl protective group. The CN reduction of aldehyde‐derived substrates (oximeethers and hydrazones) is enabled by using 1,4‐dioxane as the solvent known to participate as the Lewis‐basic component in FLP‐type heterolytic dihydrogen splitting. More basic ketone‐derived hydrazones act as Lewis bases themselves in
B(C 6 F 5)3催化的氢化作用适用于带有易于去除的邻苯二甲酰基保护基的乙二肟三异丙基甲硅烷基醚和。醛衍生的底物(肟醚和as)的CN还原可通过使用1,4-二恶烷作为已知参与FLP型杂二氢裂解的路易斯碱组分的溶剂来实现。在FLP型二氢活化中,更多的碱性酮衍生的azo酮充当Lewis碱本身,因此在不给体的甲苯中成功氢化。醛和酮衍生的底物之间的反应性差异也反映在所需的催化剂负载量和二氢压力上。
Regioselective Reduction of 2-(Arylideneamino)isoindole-1,3-diones− Synthesis of Alkaloid Analogues byN-Acylhydrazonium Ion Aromaticπ-Cyclization
Hydroxylactams 6a−c and 7a−c were synthesized by successive regioselectivereductions of arylideneaminophthalimides 3a−c, which were easily available from aminophthalimide 1 and benzaldehyde (2a) or thiophenecarboxaldehydes 2b and 2c. N-Acylhydrazonium ions III, generated in the presence of Lewis acid from acetoxy derivatives 8a and 9a of hydroxylactams 6a and 7a, or in organic acid medium directly
Chemoselectivity of 2-Arylmethyleneaminoisoindolin-1,3-diones toward Arenes under Friedel-Crafts Conditions: An Efficient Synthesis of Benzophenones Integrated with 2-Substituted Hydrazone Moieties
作者:Hamed A. Derbala
DOI:10.1002/jhet.854
日期:2012.5
Treatment 2‐arylmethyleneaminoisoindole‐1,3‐diones 1a–c with arenes in the presence of AlCl3‐DMF complex as a catalyst afforded the novel compounds, 2‐((arylidenehydrazono)(aryl)‐methyl)benzophenones 3a–n in satisfactory yields. The structure of the obtained products 3a–n was confirmed by the use of IR, 1H‐NMR, 13C‐NMR, mass spectra, and elemental analyses.
Tin powder-promoted allylation and cyclization of 2-(benzylideneamino)isoindoline-1,3-diones
作者:Nibras Ahmed Elaas、Danfeng Huang、Ke-Hu Wang、Yingpeng Su、Yulai Hu
DOI:10.1515/hc-2017-0249
日期:2018.6.27
Abstract α-Methylene-γ-lactams were synthesized from readily available N-acylhydrazones by a tin-mediated Barbier-type reaction. The method avoids the use of toxic allylstannanes and the reaction proceeds smoothly under mild conditions.
Benzylic C(sp<sup>3</sup>)–H Bonds Play the Dual Role of Starting Material and Oxidation Inhibitor for Hydrazides in the Electrochemical Synthesis of Hydrazones
作者:Issa Yavari、Sina Shaabanzadeh
DOI:10.1021/acs.joc.2c01574
日期:2022.11.18
provides an acceptable condition for synthesizing hydrazones with various functional groups in good efficiency and amenable to gram-scale synthesis. The electrochemical oxidation condition proves an excellent level of compatibility with super cheap electrolyte NaCl for the oxidation of benzylic C(sp3)–H position despite the highly oxidizable hydrazide group remaining intact in the reaction.