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View article: CCDC 2386528: Experimental Crystal Structure Determination
CCDC 2386528: Experimental Crystal Structure Determination Open
An entry from the Cambridge Structural Database, the world’s repository for small molecule crystal structures. The entry contains experimental data from a crystal diffraction study. The deposited dataset for this entry is freely available …
View article: [3+2] Cycloaddition Reactions of Α-Trifluoromethyl Imino Esters with Nitrile Imines: Construction of Penta-Substituted 5-Cf3-1,2,4-Triazolines
[3+2] Cycloaddition Reactions of Α-Trifluoromethyl Imino Esters with Nitrile Imines: Construction of Penta-Substituted 5-Cf3-1,2,4-Triazolines Open
View article: Synthesis of Ring Fused Difluoromethyl Pyrazolines and Pyrazoles by Cycloaddition of Difluoroacetohydrazonoyl Bromides with Cyclic Α,Β-Unsaturated Carbonyl Compounds
Synthesis of Ring Fused Difluoromethyl Pyrazolines and Pyrazoles by Cycloaddition of Difluoroacetohydrazonoyl Bromides with Cyclic Α,Β-Unsaturated Carbonyl Compounds Open
View article: Tin Powder-Promoted Synthesis of 1,3-Disubstituted 1,3-Dihydroisobenzofuran Compounds
Tin Powder-Promoted Synthesis of 1,3-Disubstituted 1,3-Dihydroisobenzofuran Compounds Open
An efficient approach for the construction of 1,3-disubstituted-1,3-dihydroisobenzofuran compounds was developed through tin powder mediated tandem allylation/oxa-Michael addition reaction of o-formyl chalcones with various allyl bromides …
View article: Synthesis of 3-Trifluoromethylpyrazole Derivatives
Synthesis of 3-Trifluoromethylpyrazole Derivatives Open
The [3＋2] cycloaddition reactions of trifluoroacetohydrazonoyl bromides with ynones, alkynoates and aynamides have been developed, and a series of 3-trifluoromethylpyrazole derivatives were obtained in medium to excellent yields.The noble …
View article: Synthesis of Trifluoromethylpyrrolopyrazole Derivatives Via [3+2] Cycloaddition of Trifluoromethyl N-Acylhydrazones or Trifluoroacetohydrazonoyl Bromides with Maleimides
Synthesis of Trifluoromethylpyrrolopyrazole Derivatives Via [3+2] Cycloaddition of Trifluoromethyl N-Acylhydrazones or Trifluoroacetohydrazonoyl Bromides with Maleimides Open
View article: Silver-Catalyzed Synthesis of CF<sub>3</sub>-Substituted 2-Imidazolines
Silver-Catalyzed Synthesis of CF<sub>3</sub>-Substituted 2-Imidazolines Open
The silver salt catalyzed [3＋2] cycloaddition reaction of trifluoromethylated N-acylhydrazones and ethyl isocyanoacetate was investigated.The reaction proceeds quickly to produce a series of trifluoromethylated 2-imidazoline compounds in h…
View article: Effect of high-quality nursing on postpartum hemorrhage and quality of life in puerperants with gestational hypertension.
Effect of high-quality nursing on postpartum hemorrhage and quality of life in puerperants with gestational hypertension. Open
High-quality nursing has certain advantages in improving postpartum hemorrhage and QOL in puerperants with gestational hypertension. It can also improve patients' negative emotions, life quality, and nursing satisfaction.
View article: Study on the Allylation of Benzol[<i>e</i>][1,2,3]oxathiazine-2,2-dioxides
Study on the Allylation of Benzol[<i>e</i>][1,2,3]oxathiazine-2,2-dioxides Open
二氧化物的烯丙基化反应研究 王 凤 黄丹凤 * 赵鹏飞 杨 明 韩侗育 王克虎 王君姣 苏瀛鹏 胡雨来 * (西北师范大学化学化工学院 兰州 730070) 摘要 探索了锡粉促进下苯并[e][1,2,3]噁噻嗪-2,2-二氧化物与烯丙基溴的烯丙基化反应.研究结果表明: 各种底物都 能顺利发生烯丙基化反应并且产物产率高; 当用烯丙基溴衍生物进行反应时, 得到的都是 γ-加成产物.该烯丙基化反
View article: Research Progress of Reactions Participated by <i>α</i>-Hydroxy Ketones
Research Progress of Reactions Participated by <i>α</i>-Hydroxy Ketones Open
α-Hydroxyl ketones are an important class of compounds.They are not only the key structural fragments of many biologically active natural products, but also the important synthetic building blocks, hence α-hydroxyl ketones are employed in …
View article: CCDC 2071660: Experimental Crystal Structure Determination
CCDC 2071660: Experimental Crystal Structure Determination Open
View article: CCDC 2038582: Experimental Crystal Structure Determination
CCDC 2038582: Experimental Crystal Structure Determination Open
View article: CCDC 2006307: Experimental Crystal Structure Determination
CCDC 2006307: Experimental Crystal Structure Determination Open
An entry from the Cambridge Structural Database, the world’s repository for small molecule crystal structures. The entry contains experimental data from a crystal diffraction study. The deposited dataset for this entry is freely available …
View article: CCDC 1937084: Experimental Crystal Structure Determination
CCDC 1937084: Experimental Crystal Structure Determination Open
View article: Study on Tin Powder-Promoted Allylation of 3-Aryl-3-hydroxy-2-oxindoles
Study on Tin Powder-Promoted Allylation of 3-Aryl-3-hydroxy-2-oxindoles Open
An efficient tin-powder-promoted C-C coupling reaction of 3-aryl-3-hydroxy-2-oxindoles with allyl bromide was disclosed, which makes tin-powder-promoted reactions beyond 1,2-addition to C＝O or C＝N double bounds, and provides a convenient a…
View article: Study on Allylation Reactions of Trifluoromethylated Acylhydrazones with Allylsilanes or Allylboronates
Study on Allylation Reactions of Trifluoromethylated Acylhydrazones with Allylsilanes or Allylboronates Open
探索了在路易斯酸存在下,三氟甲基酰腙与烯丙基三甲基硅烷或烯丙基硼酸频哪醇酯的烯丙基化反应,高产率地获得了一系列三氟甲基取代的高烯丙基酰肼类化合物.研究结果表明,在三氟甲基酰腙的烯丙基化反应中,烯丙基硼酸频哪醇酯比烯丙基三甲基硅烷的活性高.
View article: Study on the Hydrocyanation Reaction of Trifluoromethylated Acylhydrazones
Study on the Hydrocyanation Reaction of Trifluoromethylated Acylhydrazones Open
探索了在路易斯酸催化下,三氟甲基酰腙与三甲基氰硅烷的1,2-加成反应,得到了一系列含有三氟甲基的氰基酰肼类化合物.该方法具有反应条件温和、操作简单、产率高等特点,为合成结构多样的含三氟甲基的酰肼类化合物提供了一种有效的方法.
View article: Triphenylphosphine Catalyzed Lu's[3+2] Annulation of Aurones and Alkenoates: Constructing of Spiro[1-benzofuran-3-one-2,5'-cyclopentene] Polycyclic Compounds
Triphenylphosphine Catalyzed Lu's[3+2] Annulation of Aurones and Alkenoates: Constructing of Spiro[1-benzofuran-3-one-2,5'-cyclopentene] Polycyclic Compounds Open
View article: Synthesis of Pyrazolines by Cascade Oxidation/Halogenoamino-cyclization Reaction of Homoallylhydrazides
Synthesis of Pyrazolines by Cascade Oxidation/Halogenoamino-cyclization Reaction of Homoallylhydrazides Open
An efficient cascade oxidation/halogenoaminocyclization reaction of homoallylhydrazides with N-halogensuccinimide was developed without addition of other additives under mild reaction conditions to provide pyrazolines.Under the optimized c…
View article: Study on the Chlorination Reaction of Hydrazones by Using of Trichloroisocyanuric Acid as Chloride Source
Study on the Chlorination Reaction of Hydrazones by Using of Trichloroisocyanuric Acid as Chloride Source Open
View article: Tin Powder Promoted Synthesis of <i>α-</i>Trifluoromethyl Homoallylic Hydrazides
Tin Powder Promoted Synthesis of <i>α-</i>Trifluoromethyl Homoallylic Hydrazides Open
Strem Chemicals, Inc., established in 1964, is a privately held manufacturer & marketer of high purity specialty chemicals.Strem's products are used for R&D and commercial scale applications, especially in the pharmaceutical, microelectron…
View article: Tin powder-promoted allylation and cyclization of 2-(benzylideneamino)isoindoline-1,3-diones
Tin powder-promoted allylation and cyclization of 2-(benzylideneamino)isoindoline-1,3-diones Open
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.
View article: CCDC 1583997: Experimental Crystal Structure Determination
CCDC 1583997: Experimental Crystal Structure Determination Open
An entry from the Cambridge Structural Database, the world’s repository for small molecule crystal structures. The entry contains experimental data from a crystal diffraction study. The deposited dataset for this entry is freely available …
View article: Chlorination of <i>α</i>-Cyanoketones and 1, 3-Dicarbonyl Compounds by Using Trichloroisocyanuric Acid as Chlorine Source
Chlorination of <i>α</i>-Cyanoketones and 1, 3-Dicarbonyl Compounds by Using Trichloroisocyanuric Acid as Chlorine Source Open
View article: CCDC 1537674: Experimental Crystal Structure Determination
CCDC 1537674: Experimental Crystal Structure Determination Open
An entry from the Cambridge Structural Database, the world’s repository for small molecule crystal structures. The entry contains experimental data from a crystal diffraction study. The deposited dataset for this entry is freely available …
View article: Synthesis of <i>α</i>-Trifluoromethyl-<i>α</i>-hydroxyl Weinreb Amides
Synthesis of <i>α</i>-Trifluoromethyl-<i>α</i>-hydroxyl Weinreb Amides Open
Selective trifluoromethylation of α-oxo-Weinreb amides was explored using trimethyl(trifluoromethyl)silane as fluorinating reagent.A series of α-trifluoromethyl-α-hydroxyl Weinreb amides were successfully synthesized and their reaction wit…
View article: Chiral Thiourea Catalyzed Asymmetric Henry Reaction: Construction of Stereogenic Center Bearing a CF<sub>3</sub> Group from 2,2,2-Trifluoroacetophenone Substrates
Chiral Thiourea Catalyzed Asymmetric Henry Reaction: Construction of Stereogenic Center Bearing a CF<sub>3</sub> Group from 2,2,2-Trifluoroacetophenone Substrates Open
An asymmetric Henry reaction with 2,2,2-trifluoroacetophenone as trifluoromethyl building block was described.This reaction was catalyzed by bifunctional thiourea derived from quinine to give the product bearing a CF 3 stereogenic center i…
View article: Lewis Acid Catalyzed Alkylation of Hydrazones by Allyl Bromide and Tin Powder: Direct access to Homoallylic Amines
Lewis Acid Catalyzed Alkylation of Hydrazones by Allyl Bromide and Tin Powder: Direct access to Homoallylic Amines Open
A simple and practical approach has been developed for the synthesis of homoallylic amines which avoids the production of toxic stannanes. In this process, the hydrazone, which was formed by reacting benzaldehyde derivatives with 2-aminois…
View article: CCDC 1537670: Experimental Crystal Structure Determination
CCDC 1537670: Experimental Crystal Structure Determination Open
An entry from the Cambridge Structural Database, the world’s repository for small molecule crystal structures. The entry contains experimental data from a crystal diffraction study. The deposited dataset for this entry is freely available …
View article: Tin-Promoted One-Pot Synthesis of Aryl/Trifluoromethyl Group Substituted Homoallylic <i>N</i>-Acylhydrazines
Tin-Promoted One-Pot Synthesis of Aryl/Trifluoromethyl Group Substituted Homoallylic <i>N</i>-Acylhydrazines Open
A series of trifluoromethylated homoallylic N-acylhydrazines were obtained from one-pot reaction of aryl trifluoroketones, acylhydrazines and allyl bromide promoted by tin powder in the presence of boron trifluoride diethyl etherate (BF 3 …