A One-Pot Synthesis of trans-N-Alkylaziridine-2-carboxylates from Amino Alcohol Esters

A series of new trans-N-alkylaziridine-2-carboxylates 3 was conveniently synthesized in a one-pot reaction by treatment of 1,2-amino alcohol mono and diesters 1 with methanesulfonyl chloride in the presence of (iPr)₂NEt. The products were obtained in good to excellent yields with high trans-selectivity.

One-Pot Synthesis of Hexahydroquinolines via Hantzsch Four-Component Reaction Catalyzed by a Cheap Amino Alcohol

An economic, efficient access to hexahydroquinolines was found. In the presence of threo-(1S,2S)-2-amino-1-(4′-nitrophenyl)-1,3-propanediol, a waste product formed in the production of chloromycetin, a one-pot, four-component Hantzsch reaction of dimedone, aldehydes, ethyl acetoacetate, and ammonium acetate at room temperature furnished hexahydroquinoline derivatives in excellent yield. A possible catalytic mechanism was also suggested.     

One-Pot Synthesis of N-Phosphoryl Amino Acids

Phosphoramidates have been considered as an important class of rationally designed therapeutics especially asoligonucleotide analogs employed as antisene and antigene agents. [1] N-Phosphoryl amino acids are of biological andpharmaceutical interest, [2] and can be used as the building blocks in synthesis of polypeptides. [3]     

A Facile One-Pot Synthesis of Vinpocetine

A one-pot synthesis of vinpocetine from vincamine was established. Lewis acids caused transesterification and/or dehydration of vincamine in EtOH. FeCl₃ catalyzed both transesterification and dehydration while Ti(OEt)₄ selectively catalyzed transesterification.     

A Short Stereoselective Total Synthesis of Racemic Patchouli Alcohol. Preliminary communication

A stereoselective four-step synthesis of racemic patchouli alcohol starting from the known 2,6,6-trimethyl-2,4-cyclohexadien-1-one [1] and 3-methylpent-4-en-1-ol [2] is described.     

L-苯甘氨酸衍生物新型三齿手性氨基醇的合成

对叔丁基苯胺经二甲基化、甲酰化得到5-叔丁基-2-二甲氨基苯甲醛;L-苯甘氨酸经LiAlH4直接还原,得到的二齿手性氨基醇与上述醛经缩合、还原,得到新型三齿手性氨基醇(2S)-2-[(5-叔丁基-2-二甲氨基)苯基]甲氨基-2-苯基乙醇。用红外光谱(IR)、质谱(MS)和核磁共振氢谱(1H-NMR)等对产物进行了结构表征。     

硅胶负载手性氨基醇聚合物的合成及其应用

以L-亮氨酸(L-Leu)为手性源,经酯化、格氏化、酰胺化等步骤制备手性单体(L-NALAA),以该单体为手性识别基团,在引发剂偶氮二异丁腈和交联剂乙二醇二甲基丙烯酸酯(EDMA)的作用下,与烯化功能硅胶发生自由基共聚反应,制备了新型键合硅胶手性固定相,其结构经FT-IR、TGA、EA表征。以4种对映异构体为模型药物对手性材料手性固定相的手性拆分性能进行研究,结果表明,手性材料手性固定相对奥美拉唑和兰索拉唑的拆分效果较好。     

A Convenient One-Pot Synthesis of Phosphino-Dipeptide Analogs

A general "one-pot" synthetic method is described for the preparation of phosphinodipeptides of type 1 , in 60-80% overall yield, allowing the variation of the substituents in f and/or g position to the phosphorus atom and also in f position to the nitrogen atom.     

One-Pot Synthesis of 2,3,4,4a,10,10a-Hexahydro-1H-phenoxazines

Russian Journal of Organic Chemistry - A procedure has been proposed for the synthesis of 2,3,4,4a,10,10a-hexahydro-1H-phenoxazines by reductive cyclization of 2-(2-nitrophenoxy)cyclohexan-1-ones...     

Convenient, Efficient One-Pot Synthesis of Ferrocenylcyanide

In asymmetric catalysis, chiral (central chiral, planar chiral, axial chiral) ferrocenylligands is one of the most successful class of auxiliaries in recent years, and some ofthem have reached the stage of industrial applications'. But many challenges remain forthe synthesis of the intermediate. One of them is how to get ferrocenylcyanide I directlyfrom ferrocenecarboxyaldehyde 2, which can be easily prepared according to thecorresponding literature2. As far as known, I is an important interm…     

A Convenient One-Pot Synthesis of Di-t-butylphosphinic Chloride

A convenient one-pot synthesis of (t-Bu)₂P(O)Cl (1) from m-chloroperbenzoic acid and (t-Bu)₂PCl is described. The byproduct m-chlorobenzoic acid is neutralized by addition of Et₃N. Complex 1 crystallizes in the monoclinic space group P2₁/c (No. 14), with a = 5.9637(2) Å, b = 11.4734(4) Å, c = 16.2400(5) Å and β = 107.7160(14).     

A Convenient One-Pot Synthesis of 1,2-Aminoalcohols

We have developed a rapid facile synthesis of 1,2-aminoalcohols from a variety of aldehyde starting materials. This one pot synthesis proceeds via the in situ formation of cyanohydrin trimethylsilyl ethers and the subsequent addition of Grignard reagents. This method is of particular use where the initial aldehyde exhibits water solubility.     

One-Pot,Multicomponent Sequential Synthesis of Benzothiazoloquinazolinones

Benzothiazolo[2,3-b]quinazolin-1-ones have been synthesized by a multicomponent reaction of substituted 2-aminobenzothiazoles with cyclic β-diketone and aromatic aldehydes in the presence of absolute ethanol. The structures of the synthesized benzothiazoloquinazolinones have been characterized by elemental analysis and spectral studies.     

Efficient One-Pot Synthesis of Doxorubicin Conjugates Through Its Amino Group to Melanotransferrin P97

Abstract

The amino group of doxorubicin 1 is reacted with bis-NHS-ester linkers 6, or anhydrides 13 to offer in high yield modified doxorubicins 7–12 and 14–16, respectively. Compounds 7–12 are mono-NHS-esters, and can be directly coupled with melanotransferrin (p97), a useful vector with the ability to cross the blood-brain barrier, to yield the expected doxorubicin-p97 conjugates. Upon activating the carboxylic group with BTTU, compound 14–16 could be used in the same reaction. Structurally, the amino group of doxorubicin is covalently bonded to the amino groups of p97. The conjugates are potential candidates for treatment of brain tumors.     

氨基酸类高分子药物合成方法的研究

用无机强酸催化酯化反应，合成了聚乙烯醇(PVA)与甘氨酸、丙氨酸的聚合物。对反应条件进行了考察，获得了具有高转化率、高纯度的最佳工艺条件。结果表明：以DMSO为溶剂，PVA浓度在3％以下，pH为3—5，温度控制在120℃一130℃，反应10h一16h后，甘氨酸转化率达44．1％，丙氨酸转化率达33．9％。     

Synthesis and Biological Evaluation of Amino Alcohol Containing 1,3,4-Oxadiazole

A series of amino alcohol derivatives containing 1,3,4-oxadiazole moieties was synthesized with 7-bromo-2-tetralone as starting materials, 2,2-dimethyl-1,3-oxazolidine as intermediates and Strecker reaction and cyclization with POCl₃ as key steps. The structures of the key intermediate and target compounds were confirmed by ¹H NMR, ¹³C NMR and HRMS. Some compounds have resulted in the generation of highly potent sphingosine 1-phosphate receptor type 1(S1P₁) agonists.     

葡萄糖衍生的新型光学活性β－氨基醇的合成

首次报道了以Ｄ－葡萄糖为原料合成新型光学活性葡萄糖衍生类β－氨基醇化合物的新方法。目标化合物：（２Ｓ，３Ｓ）－甲基－２－脱氧－２－苯胺基－４，６－ｏ－苄叉基－α－Ｄ－吡喃阿卓糖苷（７）经各种分析测试手段证实。