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Molbank, Volume 2006, Issue 6 (December 2006)

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Open AccessShort Note 4α,14α,Dimethyl-5α-cholest-8-en-3-one thiosemicarbazone
Molbank 2006, 2006(6), M504; https://doi.org/10.3390/M504
Received: 1 August 2005 / Accepted: 17 October 2006 / Published: 1 December 2006
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Abstract
The compound 2 was prepared from equimolecular quantity of 1 (1g, 2.43 mmol), derivative triterpene resulting from Euphorbia officinarum1, and thiosemicarbazide2,3 dissolved in ethanol with several drops of conc. H2SO4.[...] Full article
Open AccessShort Note 4α,14α,Dimethyl-5α-cholest-8-en-3-one thiadiazoline
Molbank 2006, 2006(6), M505; https://doi.org/10.3390/M505
Received: 1 August 2005 / Accepted: 17 October 2006 / Published: 1 December 2006
Cited by 1 | PDF Full-text (72 KB) | HTML Full-text | XML Full-text | Supplementary Files
Abstract
The compound 2 (0.21g, 0.25mmol) was dissolved in 1ml of pyridine and 1ml of acetic anhydride1,2.[...] Full article
Open AccessShort Note 3β-Acetoxy-elemo-lanost-8-en-24-one
Molbank 2006, 2006(6), M506; https://doi.org/10.3390/M506
Received: 1 August 2005 / Accepted: 17 October 2006 / Published: 1 December 2006
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Abstract
The sodium periodate is prepared in situ with a equimolecular quantity of soda NaOH (0.5g; 12.50 mmol) and periodic acid H5IO6 (2.85g; 12.50 mmol), the mixture is stirred at 0°C. After 15 min, 5 ml of CCl4, 5 ml of
[...] Read more.
The sodium periodate is prepared in situ with a equimolecular quantity of soda NaOH (0.5g; 12.50 mmol) and periodic acid H5IO6 (2.85g; 12.50 mmol), the mixture is stirred at 0°C. After 15 min, 5 ml of CCl4, 5 ml of H3CCN and 93.03mg (0.12mmol) of ruthenium trichloride1,2 were added.[...] Full article
Open AccessShort Note 3β-Tosyloxy-elemo-lanost-8-en-24-one
Molbank 2006, 2006(6), M507; https://doi.org/10.3390/M507
Received: 1 August 2005 / Accepted: 17 October 2006 / Published: 1 December 2006
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Abstract
The sodium periodate is prepared in situ with equimolecular quantity of soda NaOH (0.5g; 12.50 mmol) and periodic acid H5IO6 (2.85g; 12.50 mmol), the mixture is stirred at 0°C.[...] Full article
Open AccessShort Note Synthesis of 2-(1,4-oxazino[2,3-b]quinoxalin-4-yl)ethanol
Molbank 2006, 2006(6), M508; https://doi.org/10.3390/M508
Received: 7 February 2005 / Accepted: 2 February 2006 / Published: 1 December 2006
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Abstract
A mixture of 2,3-dichloroquinoxaline 1[1] (5.0 g, 25 mmol) and diethanolamine 2 (12 mL, 125 mmol) was heated to 130° C for 3 h, with magnetic stirring.[...] Full article
Open AccessShort Note Synthesis of N, N-Dimethyl-3-phenoxyquinoxalin-2-amine
Molbank 2006, 2006(6), M509; https://doi.org/10.3390/M509
Received: 7 February 2005 / Accepted: 2 February 2006 / Published: 1 December 2006
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Abstract
The two chloro groups in 2,3-dichloroquinoxaline 1 can be displaced by nucleophiles, a process that may take place in a stepwise manner [1].[...] Full article
Open AccessShort Note Synthesis of 2-Chloro-3-(2-naphthyloxy)quinoxaline
Molbank 2006, 2006(6), M510; https://doi.org/10.3390/M510
Received: 7 February 2005 / Accepted: 2 February 2006 / Published: 1 December 2006
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Abstract
A mixture of 2,3-dichloroquinoxaline 1 [1] (1.0 g, 5 mmol) and 2-naphthol (0.72 g, 5 mmol) in pyridine (10 mL) was heated to 130°C for 3 h, with magnetic stirring, to give a dark-brown reaction mixture.[...] Full article
Open AccessShort Note 4,4'-Diethylaminoethoxyhexestrol dihydrochloride
Molbank 2006, 2006(6), M511; https://doi.org/10.3390/M511
Received: 23 November 2004 / Accepted: 10 November 2006 / Published: 1 December 2006
Cited by 1 | PDF Full-text (36 KB) | HTML Full-text | XML Full-text | Supplementary Files
Abstract
The bis-diethylaminoethylether of hexestrol has been shown to be hypocholesteremic by inhibiting the reduction of desmosterol to cholesterol.[...] Full article
Open AccessShort Note Spectroscopic and ab-initio study of schiff base ligand 4-[(2-hydroxyethylamino)-methylene]-5-methyl-2-p-tolyl-2,4-dihydro-pyrazol-3-one
Molbank 2006, 2006(6), M512; https://doi.org/10.3390/M512
Received: 6 July 2006 / Accepted: 18 July 2006 / Published: 1 December 2006
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Abstract
Pyrazolone ring systems represent an important class of compounds [1] not only for their theoretical interest but also for their number of application in diverse area [2-6].[...] Full article
Open AccessShort Note Synthesis of 1-benzyl-3-chloro-4-(3,4,5-trimethoxyphenyl)azetidin-2-one
Molbank 2006, 2006(6), M513; https://doi.org/10.3390/M513
Received: 6 July 2006 / Accepted: 3 August 2006 / Published: 1 December 2006
PDF Full-text (136 KB) | HTML Full-text | XML Full-text | Supplementary Files
Abstract
Combretastatin A-4, isolated from a South African tree Combretum caffrum, is one of the most potent anti-tomour agents. In this paper, an analogue of Combretastatin A-4 was synthesized in order to improve the anti-tumour activity. Compound was characterized by IR and 1HNMR. Full article
Open AccessShort Note Compare of three ways of synthesis of simple Schiff base
Molbank 2006, 2006(6), M514; https://doi.org/10.3390/M514
Received: 6 July 2006 / Accepted: 3 August 2006 / Published: 1 December 2006
Cited by 2 | PDF Full-text (104 KB) | HTML Full-text | XML Full-text | Supplementary Files
Abstract
In this paper we propose the synthesis of (E)-4-methyl-N-(3,4,5-trimethoxybenzylidene) benzenamine in different ways and compare of the way of synthesize it. As a result, microwave irradiation is the simple way to synthesis this Schiff base. Full article
Open AccessShort Note Rhodamine B Pentyl Ester and its Methyl, Ethyl, Propyl, and Butyl Homologues
Molbank 2006, 2006(6), M515; https://doi.org/10.3390/M515
Received: 22 June 2006 / Accepted: 11 August 2006 / Published: 1 December 2006
Cited by 2 | PDF Full-text (118 KB) | HTML Full-text | XML Full-text | Supplementary Files
Abstract
The rhodamines are a highly fluorescent class of compound used in many different fields of research, from the lasing medium in dye lasers to biological stains and markers for cellular drug resistance [1-3].[...] Full article
Open AccessShort Note Synthesis of 3-[(Z)-2-piperazin-1-yl-ethylimino]-1,3-dihydro indol-2-one as a novel Schiff base
Molbank 2006, 2006(6), M516; https://doi.org/10.3390/M516
Received: 9 September 2006 / Accepted: 20 October 2006 / Published: 1 December 2006
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Abstract
Isatin (1H-indole-2,3-dione) was first obtained by Erdman and Laurent in 1841 as a product from the oxidation of indigo by nitric and chromic acids [1].[...] Full article
Open AccessShort Note Synthesis of 3-[(Z)-5-Amino-1, 3, 3-trimethyl cyclohexyl methylimino]-1, 3-dihydroindol-2-one as a novel Schiff base
Molbank 2006, 2006(6), M517; https://doi.org/10.3390/M517
Received: 21 July 2006 / Accepted: 20 October 2006 / Published: 1 December 2006
PDF Full-text (42 KB) | HTML Full-text | XML Full-text | Supplementary Files
Abstract
Isatin (1H-indole-2,3-dione) was first obtained by Erdman and Laurent in 1841 as a product from the oxidation of indigo by nitric and chromic acids [1].[...] Full article
Open AccessShort Note Synthesis of 2-(2-napthylthio)-quinoline-3-carboxaldehyde as a novel complexing agent
Molbank 2006, 2006(6), M518; https://doi.org/10.3390/M518
Received: 9 September 2006 / Accepted: 27 September 2006 / Published: 1 December 2006
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Abstract
In this paper we propose the synthesis of 2-(2-napthylthio)-quinoline-3-carboxaldehyde. In addition to its synthesis we present elemental, IR, and NMR spectral analysis to characterize the molecule. Full article
Open AccessShort Note Synthesis and Protonation Constants of an Amide-Based Chelating Cyclophane
Molbank 2006, 2006(6), M519; https://doi.org/10.3390/M519
Received: 21 July 2006 / Accepted: 29 September 2006 / Published: 1 December 2006
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Abstract
Our research group have reported that, under high dilution conditions, condensation reactions between 4,4’-ethylenebis(2,6-morpholinedione), 1, and aromatic diamines gave a new series of tetraaza chelating cylophanes, which have amide and aromatic groups in the ring framework and pendant carboxymethyl groups [1].[...] Full article
Open AccessShort Note Synthesis and Detailed Spectroscopic Characterization of Two Novel N-(3-Acetyl-2-thienyl)acetamides
Molbank 2006, 2006(6), M520; https://doi.org/10.3390/M520
Received: 1 September 2006 / Accepted: 20 October 2006 / Published: 1 December 2006
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Abstract
The title compounds – N-(3-acetyl-2-thienyl)-2-bromoacetamide and N-(3-acetyl-2-thienyl)-2- phthalimidoacetamide – were synthesized in one step from 3-acetylthiophen-2-amine and the corresponding acetyl halogenides. Detailed spectroscopic data (1H NMR, 13C NMR, 15N NMR, MS, IR) for these compounds are presented. Full article
Open AccessShort Note The First Example of Oxidative Nucleophilic Substitution of Hydrogen in meso-Aryl Ring of the 5,10,15,20-Tetraphenylporphyrin Derivatives
Molbank 2006, 2006(6), M521; https://doi.org/10.3390/M521
Received: 11 October 2006 / Accepted: 20 October 2006 / Published: 1 December 2006
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Abstract
A synthesis of [2-nitro-5-(10,15,20-triphenylporphyrin-5-yl)-phenyl]phenyl-acetonitrile zinc complex by the reaction of the respective nitroporphyrin with the anion of benzyl cyanide, followed by addition of DDQ, is described. This is the first example of this type of process in the nitrophenyl side ring of meso
[...] Read more.
A synthesis of [2-nitro-5-(10,15,20-triphenylporphyrin-5-yl)-phenyl]phenyl-acetonitrile zinc complex by the reaction of the respective nitroporphyrin with the anion of benzyl cyanide, followed by addition of DDQ, is described. This is the first example of this type of process in the nitrophenyl side ring of meso-tetraarylporphyrin derivatives. Full article
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