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Molecules, Volume 4, Issue 11 (November 1999), Pages 320-337, Articles M116-M124

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Research

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Open AccessArticle 17O NMR Spectra of α,β-Unsaturated Carbonyl Compounds RCH=CHCOX: the Influence of Group X on the δ(17O) Value of the Carbonyl Oxygen and on the Shielding Effect of Group R
Molecules 1999, 4(11), 320-328; doi:10.3390/41100320
Received: 25 August 1999 / Accepted: 12 September 1999 / Published: 26 October 1999
Cited by 4 | PDF Full-text (61 KB)
Abstract
17O NMR spectra of RCOX (R = Me, Ph), RCH=CHCOX (R = H, Ph, Me, CO2Et) and Me2C=CHCOX (X = H, Me, Et, i-Pr, t-Bu, Ph, PhCH=CH, OMe, OEt, Cl, CN, CF3, CO2Et) are
[...] Read more.
17O NMR spectra of RCOX (R = Me, Ph), RCH=CHCOX (R = H, Ph, Me, CO2Et) and Me2C=CHCOX (X = H, Me, Et, i-Pr, t-Bu, Ph, PhCH=CH, OMe, OEt, Cl, CN, CF3, CO2Et) are reported. The 17O shift values of these carbonyl compounds depend mainly on the electron donating power of X and correlate well with the resonance constants sR+ of X. This suggests that the d(17O) values can be used to reflect qualitatively the electrophilicity of the carbonyl group. The shielding effect of the substituent R in RCH=CHCOX is diminished with increasing the electronic donating power of X and correlates with s+ values of X. Full article
Open AccessArticle 8-Chloro-11-[4-(8-chloro-5H-dibenzo[b,e][1,4]diazepin-11-yl)piperazino]-5H-dibenzo[b,e][1,4]diazepine
Molecules 1999, 4(11), 329-332; doi:10.3390/41100329
Received: 13 August 1999 / Accepted: 20 October 1999 / Published: 25 October 1999
Cited by 1 | PDF Full-text (22 KB)
Abstract A method to synthesize desmethylclozapine, 3, is reported. The procedure afforded the target compound in 69% yield. A by-product, isolated from the reaction mixture in 11% yield, proved to be the title compound, 4. Full article
Open AccessArticle Fast Solvent-free Alkylation of Amides and Lactams under Microwave Irradiation
Molecules 1999, 4(11), 333-337; doi:10.3390/41100333
Received: 11 October 1999 / Accepted: 20 October 1999 / Published: 25 November 1999
Cited by 15 | PDF Full-text (31 KB)
Abstract N-Substituted amides and lactams are rapidly N-alkylated under solvent-free phase-transfer catalytic conditions using microwaves. Full article

Other

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Open AccessShort Note 1-Hydroxymethyl-3-ethoxy-5-methylpyrazole
Molecules 1999, 4(11), M116; doi:10.3390/M116
Received: 18 September 1999 / Accepted: 4 October 1999 / Published: 23 November 1999
Cited by 5 | PDF Full-text (91 KB) | Supplementary Files
(This article belongs to the Section Molbank Section of Molecules, 1997-2001)
Open AccessShort Note 1,3-Bis(pyrrolidin-2-on-1-yl)but-1-ene
Molecules 1999, 4(11), M117; doi:10.3390/M117
Received: 17 September 1999 / Accepted: 4 October 1999 / Published: 23 November 1999
Cited by 3 | PDF Full-text (83 KB) | Supplementary Files
(This article belongs to the Section Molbank Section of Molecules, 1997-2001)
Open AccessShort Note Methyl (2E,4E)-5-Anilino-4-(methoxycarbonyl)penta-2,4-dienoate
Molecules 1999, 4(11), M118; doi:10.3390/M118
Received: 17 September 1999 / Accepted: 4 October 1999 / Published: 23 November 1999
Cited by 1 | PDF Full-text (90 KB) | Supplementary Files
(This article belongs to the Section Molbank Section of Molecules, 1997-2001)
Open AccessShort Note 3-Cyano-2-cyanomethylthio-4-methoxymethyl-6-methylpyridine
Molecules 1999, 4(11), M119; doi:10.3390/M119
Received: 13 October 1999 / Accepted: 14 October 1999 / Published: 23 November 1999
PDF Full-text (88 KB) | Supplementary Files
(This article belongs to the Section Molbank Section of Molecules, 1997-2001)
Open AccessShort Note 4-{[3-cyano-4-(methoxymethyl)-6-methyl-2-pyridinyl]oxy}benzoic acid
Molecules 1999, 4(11), M120; doi:10.3390/M120
Received: 13 October 1999 / Accepted: 14 October 1999 / Published: 23 November 1999
PDF Full-text (90 KB) | Supplementary Files
(This article belongs to the Section Molbank Section of Molecules, 1997-2001)
Open AccessShort Note 3a,4,5,6,7,8,9,10,11,12,13,13a-Dodecahydro-3-(4-chlorophenyl)cyclododeca[d]isoxazole
Molecules 1999, 4(11), M121; doi:10.3390/M121
Received: 22 October 1999 / Accepted: 1 November 1999 / Published: 23 November 1999
PDF Full-text (90 KB) | Supplementary Files
(This article belongs to the Section Molbank Section of Molecules, 1997-2001)
Open AccessShort Note 3a,4,5,6,7,8,8a-Heptahydro-3-(4-chlorophenyl)cyclohept[d]isoxazole
Molecules 1999, 4(11), M122; doi:10.3390/M122
Received: 22 October 1999 / Accepted: 1 November 1999 / Published: 23 November 1999
PDF Full-text (90 KB) | Supplementary Files
(This article belongs to the Section Molbank Section of Molecules, 1997-2001)
Open AccessShort Note 3a,4,5,6,7,8,9,9a-Octahydro-3-(4-chlorophenyl)cyclooct[d]isoxazole
Molecules 1999, 4(11), M123; doi:10.3390/M123
Received: 22 October 1999 / Accepted: 1 November 1999 / Published: 23 November 1999
PDF Full-text (91 KB) | Supplementary Files
(This article belongs to the Section Molbank Section of Molecules, 1997-2001)
Open AccessShort Note 4,5-Dihydro-3-(4-chlorophenyl)-5-decylisoxazole
Molecules 1999, 4(11), M124; doi:10.3390/M124
Received: 22 October 1999 / Accepted: 1 November 1999 / Published: 23 November 1999
PDF Full-text (89 KB) | Supplementary Files
(This article belongs to the Section Molbank Section of Molecules, 1997-2001)

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