(1′R,2S,2′S)-2-(2-甲基-2-溴甲基-3-亚甲基)环戊基丙酸的合成

以商业易得的（＋ ）内向３溴莰酮２ 为手性源合成了光学活性的（１′ Ｒ,２ Ｓ,２′ Ｓ）２（２溴甲基２甲基３亚甲基）环戊基丙酸。     

(2R,3S)-2-[(R)-1-[3,5-二(三氟甲基)苯基]乙氧基]-3-(4-氟苯基)吗啉盐酸盐的合成

对甲氧基苯甲醛(3)和2-氨基乙醇进行还原胺化反应得2-(4-甲氧基苄胺基)乙醇(4),4和乙醛酸经成环反应得2-羟基-4-对甲氧基苄基吗啉-3-酮(5),5和三氟乙酐反应得6后与(R)-1-[3,5-二(三氟甲基)苯基]乙醇(7)缩合,再经结晶诱导不对称转化、格氏反应、氢化脱保护及成盐反应制得阿瑞吡坦关键中间体(2R,3S)-2-[(R)-1-[3,5-二(三氟甲基)苯基]乙氧基]-3-(4-氟苯基)吗啉盐酸盐,总收率约18%(以3计)。     

3′-(4-(Benzyloxy)phenyl)-1′-phenyl-5-(heteroaryl/aryl)-3,4-dihydro-1′H,2H-[3,4′-bipyrazole]-2-carboxamides as EGFR kinase inhibitors: Synthesis,anticancer evaluation,and molecular docking studies

Pyrazoline-linked carboxamide derivatives were designed, synthesized, and evaluated for potential epidermal growth factor receptor (EGFR) kinase inhibition, anticancer activity, and apoptotic and cardiomyopathy toxicity. Compounds 6m and 6n inhibit EGFR kinase at a concentration of 6.5 ± 2.91 and 3.65 ± 0.54 µM, respectively. Some of these compounds showed effects on proliferation, which were also then evaluated against four different human cancer cell lines, that is, MCF-7 (breast cancer), A549 (non-small-cell lung tumor), HCT-116 (colon cancer), and SiHa cells (cancerous tissues of the cervix uteri). The results showed that certain synthetic compounds showed significant inhibitor activity; compounds 6m and 6n were more cytotoxic than doxorubicin against A549 cancer cells, with IC₅₀ values of 10.3 ± 1.07 and 4.6 ± 0.57 µM, respectively. Additionally, compounds 6m and 6n induced apoptosis in A549 cancer cells, as evidenced by 4′,6-diamidino-2-phenylindole (DAPI) staining and phase-contrast microscopy. Potency to induce apoptosis by compound 6n was further confirmed by fluorescence-activated cell sorting using Annexin V-FITC and propidium iodide labeling. Compound 6n showed normal cardiomyocytes with no marked sign of pyknotic nuclei in cardiomyopathy and also normal histological appearance of the renal cortex when compared with that of control. Results of molecular docking studies suggested that compounds 6m and 6n can bind to the hinge region of the adenosine triphosphate-binding site of EGFR kinase, like the standard drug erlotinib. Therefore, the present study suggests that compounds 6m and 6n have potent in vitro antitumor activities against the human non-small-cell lung tumor cell line A549, which can be further explored in other cancer cell lines and in animal studies.     

麻黄素中间体[(S)-(-)-α-甲胺基苯丙酮]2·(2R,3R)-(-)-二苯甲酰酒石酸的HPLC测定

建立了HPLC法测定合成麻黄素的中间体[(S)-(-)-α-甲胺摹苯丙酮]2(2R,3R)-(-)-二苯甲酰酒石酸中的(S)-(-)-α-甲胺基苯丙酮和(2R,3R)-(-)-二苯甲酰酒石酸.采用C18色谱柱,以0.05 mol/L磷酸二氢钾溶液-甲醇(80:20)为流动相,检测波长238 nm.两者在0.05~0.20 mg/ml和0.06～O.24 mg/ml浓度范围内线性关系良好,回收率为99.8%和99.6%,RSD均为0.6%.     

(1S,2R,3R)-2-[(E)-3-氧代辛-1-烯基]-3-羟基-1-甲酯基环戊烷的合成

以四氢吡喃炔丙醇和１－溴－３－氯丙烷为原料经７步反应制备合成前列腺素Ｊ２的重要中间体，７－氰基－３，４－反－环氧庚－１－烯（９），并以９闭环合成（１Ｓ，２Ｒ，３Ｒ）－２－［（Ｅ）－３氧代辛－１－烯基］－３－羟基－１－甲酯基环戊烷（１６）。     

5′-RS-1,5-二氧代-(5′-乙基-5′-羟基-2′H,5′H,6′H-6-氧代吡喃)-[3′,4′,f]-Δ6(8)-四氢中氮茚的合成工艺改进

目的改进喜树碱关键中间体5′-RS-1,5-二氧代-(5′-乙基-5′-羟基-2′H,5′H,6′H-6-氧代吡喃) -[3′,4′,f]-Δ6(8)-四氢中氮茚(1)的合成工艺.方法以6-氰基-1,1-亚乙二氧基-7-(1′-乙氧羰基)丙基-5-氧代-Δ6(8)-四氢中氮茚(2)为原料,经氢化和亚硝化、脱氮、混合金属催化氧化、环合及三氟乙酸脱保护反应得到目标产物.结果与结论新工艺简化了操作、缩短了反应时间,总产率达到了72.4%.     

(3R,4R)-3-[(R)-1-叔丁基二甲基硅氧乙基]-4-乙酰氧基-2-氮杂环丁酮的合成

（３Ｒ，４Ｒ）┐３┐［（Ｒ）┐１┐叔丁基二甲基硅氧乙基］┐４┐乙酰氧基┐２┐氮杂环丁酮的合成△ＳＹＮＴＨＥＳＩＳＯＦ（３Ｒ，４Ｒ）┐４┐ＡＣＥＴＯＸＹ┐３┐［（Ｒ）┐１┐（ｔ┐ＢＵＴＹＬＤＩＭＥＴＨＹＬＳＩＬＹＬＯＸＹ）ＥＴＨＹＬ］┐２┐ＡＺＥＴＩＤ...     

手性(2R,3R)-2,3-环氧丁酸盐的制备

目的用L-苏氨酸制备手性(2R,3R)-2,3-环氧丁酸盐,并对成盐方法、晶型、稳定性进行研究。方法 L-苏氨酸经重氮化、环氧化形成手性(2R,3R)-2,3-环氧丁酸,再与无机或有机碱成盐。研究酸碱度、温度、溶剂、溶液体系等对成盐的影响,XRD、SEM考察盐的晶型和形貌。测试盐与胺的反应,并监测其稳定性。结果得到手性(2R,3R)-2,3-环氧丁酸锂、钠、钾、钙、镁、铵、一甲胺、二甲胺、对甲氧基苯胺盐,IR、1H-NMR、MS确证结构,1年内稳定。液-液或气-液成盐较好,低温下在醇、酮溶剂中钠、钾盐收率超过80%。XRD、SEM显示,溶媒法环氧丁酸盐为晶态,冻干环氧丁酸钠盐为无定形态,粒径小于10μm。环氧丁酸盐与胺反应手性保持,冻干粉反应活性较高。结论环氧丁酸盐稳定,制备工艺简单,质量可控,可用于碳青霉烯类抗生素的制备。     

Synthesis of novel 2-(3′-aryl-sydnon-4′-ylidene)-5′-substituted-[1,3,4]-thiadiazolylamines and [1,3,4]-thiadiazol-2′-yl-3-oxo-[1,2,4]-triazoles as antimicrobial agents

The title compounds (3g–n) and (6g–n) were synthesized using 3-arylsydnones as synthons, and the structures were confirmed by IR, ¹H NMR, FAB mass and CHN analysis. These compounds were evaluated for their antibacterial and the antifungal activities in terms of minimum inhibitory concentrations (MICs) against the bacterial strains E. coli, B. cereus, and the fungal strains A. niger, C. albicans. Some of the compounds have shown significant activities.     

(R)-( )-和(S)-(-)-β,β′-联萘酚的制备

手性试剂(R)-( )-和(S)-(—)-β,β′-联萘酚[( )-1和(—)-1]由于能制得高纯度的对映体,光学性质稳定,且具有很强的面不对称性,在不对称合成中易生成高比例 ee 值的产物。已成功地应用于不对称还     

Synthesis of bioactive spiro-2-[3′-(2′-phenyl)-3H-indolyl]-1-aryl-3-phenylaziridines and SAR studies on their antimicrobial behavior

The present communication deals with synthesis of a new series of spiro-2-[3′-(2′-phenyl)-3H-indolyl]-1-aryl-3-phenylaziridines. Infrared (IR), ¹H nuclear magnetic resonance (NMR), mass spectral, and elemental analysis data corroborated the structure of all synthesized compounds. Synthesized compounds were screened for antimicrobial activity against a representative panel of Gram-positive and Gram-negative bacteria. All newly synthesized compounds showed remarkable antimicrobial behavior. Structure–activity relationship (SAR) investigations were applied to investigate the correlation between the molecular refractive index (M_R) parameter of the compounds and their biological activity profile. All compounds were subjected to acute toxicity studies to determine 50% lethal dose (LD₅₀) values.     

Preparation of 2R, 3S, 2′R-nadolol enantiomer using S-(-)-menthyl chloroformate as a chiral derivatizing reagent

Stereoisomers of nadolol were derivatized with S-(-)-menthyl chloroformate((-)-MCF) forming their diastereomers, RSR-nadolol-(-)-MCF, SRS-nadolol-(-)-MCF, RRS-nadolol-(-)-MCF and SSRnadolol-(-)-MCF. Diastereomeric mixture were then chromatographically resolved by preparative HPLC (JAIGEL-ODS-BP-L, 500 × 25 mm column) eluted with methanol-water (84:16, v/v) at flow rate 2.5 mL/min. RSR-nadolol-(-)-MCF diastereomer was hydrolyzed with 5% LiOH at 80°C for 48 h, and the decomposed mixture was further purified by semi-preparative HPLC. The purity and final yield of RSR-nadolol were 99.97% and 12.95%, respectively.     

2-(4-氯-3-甲基苯基)-1,2,4-三嗪-3,5(2H,4H)-二酮的合成

对硝基邻甲苯胺经重氮化、氯代、还原、闭环、水解、脱羧6步反应得到2-（4-氯-3-甲基苯基）-1,2,4-三嗪-3,5（2H,4H）-二酮,总收率约40%。     

Antitumour activity of 5-[(2E)-1-(1H-benzimidazol-2-yl)-3-substituted phenylprop-2-en-1-ylidene] pyrimidine-2,4,6(1H,3H,5H)-triones against Dalton’s ascitic lymphoma in mice

A new series of novel benzimidazole derivatives containing barbitone moiety (5a–f) was synthesized by a Knoevenagel condensation of (2E)-1-(1H-benzimidazol-2-yl)-3-phenylprop-2-en-1-ones (4a–f) and barbituric acid in the presence of catalytic amount of acetic acid medium. All the final structures were assigned on the basis of IR, ¹H NMR and mass spectra analysis. Acute toxicity studies were performed initially to determine the safety of titled derivatives and the ED ₅₀ value was calculated 50 mg/kg. All the final derivatives were screened for antitumour activity against Dalton’s ascitic lymphoma in mice. All the new candidates at a dose of 50 mg/kg showed a good antitumour activity against DLA-bearing mice when compared to the standard 5-fluro uracil. Among the final derivatives (5e), 5-[(2E)-1-(1H-benzimidazol-2-yl)-3-(3-nitrophenyl) prop-2-en-1-ylidene] pyrimidine-2,4,6(1H,3H,5H)-trione was found to be most potent antitumour in nature.     

(2S,3R)-1-二甲氨基-3-(3-甲氧基苯基)-2-甲基戊-3-醇的合成工艺研究

目的 对(2S,3R)- 1-二甲氨基-3-(3-甲氧基苯基)-2-甲基戊-3-醇合成工艺进行研究.方法 以3-戊酮为起始原料,经Mannich反应、手性拆分、Grignard反应等步骤合成(2S,3R)-1-二甲氨基-3-(3-甲氧基苯基)-2-甲基戊-3-醇,并对化学拆分进行工艺优化.结果 合成(2S,3R)-1...     

(1R,2S)-(-)-麻黄碱盐酸盐的合成

设计并实现了（1R，2s）-（-）-麻黄碱盐酸盐的一种不对称合成法，以2-溴-1-苯基-1-丙酮为起始原料，经（S’）-α-苯乙胺胺化、分离、KBH4立体选择性还原、Leuckan反应及钯炭脱苄等制得目标物，总收率约25％。     

HPLC法测定(1R,2R)-(-)-1,2-环己二胺中S,S对映异构体

目的建立高效液相色谱法测定(1R,2R)-(-)-1,2-环己二胺中S,S对映异构体含量的方法。方法柱前衍生反相高效液相色谱法,利用间甲基苯甲酰氯为衍生化试剂,采用Chiral-AGP(4.0 mm×150 mm)色谱柱,以异丙醇-磷酸盐缓冲液(pH值=6.1)(15∶85)为流动相、流速0.7 mL.min-1、检测波长为214 nm。结果 1,2-环己二胺的R,R与S,S对映异构体衍生物达到基线分离;S,S-对映异构体的定量限为30.1 ng、检测限12.4 ng;S,S-对映异构体在0.015～0.09μg.mL-1浓度范围内线性良好,平均回收率为98.3%,RSD(n=9)为9.36%。结论建立的间甲基苯甲酰氯柱前衍生高效液相色谱法适用于(1R,2R)-(-)-1,2-环己二胺中S,S对映异构体含量的测定。     

(R,S)-2-氨基丙醇的制备

氯丙酮经乙酸基化、碱性水解、Raney Ni催化还原胺化得到（R，S）-2-氨基丙醇，总收率44％。     

Synthesis and anti-HIV-1 screening of novel N′-(1-(aryl)ethylidene)-2-(5,5-dioxido-3-phenylbenzo[e]pyrazolo[4,3-c][1,2]thiazin-4(1H)-yl)acetohydrazides

A novel series of N′-(1-(aryl)ethylidene)-2-(5,5-dioxido-3-phenylbenzo[e]pyrazolo[4,3-c][1,2]thiazin-4(1H)-yl)acetohydrazides was synthesized. The synthesis was carried out by thermal method as well as ultrasonic bath to reduce reaction time and to enhance product yields. The synthesized compounds were characterized by spectroscopic techniques like NMR, infrared and EIMS. The structure of compound 5w was elucidated by X-ray crystallography. The titled compounds were evaluated for anti-human immunodeficiency virus type 1 (anti-HIV-1) and cytotoxic activities. Biological studies indicated that amongst these compounds, 5a, b, j, h and i showed the activity with median effective concentration (EC₅₀) values less than 20 μM. Compound 5i exhibited the most potent anti-HIV-1 activity (EC₅₀ = 3.2 μM) while 5h showed anti-HIV-1 activity (EC₅₀ = 3.8 μM) with no toxicity at all in primary human lymphocytes, CEM and VERO cells.