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Molecules, Volume 2, Issue 6 (June 1997), Pages 87-99, Articles M14-M22

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Open AccessArticle 10-Undecenoic Acid, an Inexpensive Source for the Synthesis of the Pheromones of Cotton Pests, Peach Tree Borer and Cherry Tree Borer
Molecules 1997, 2(6), 87-90; doi:10.3390/20600087
Received: 10 January 1997 / Accepted: 4 April 1997 / Published: 10 June 1997
Cited by 3 | PDF Full-text (23 KB)
Abstract
The aldehyde 7, derived from 10-undecenoic acid (5) on cis-selective Wittig reaction with pentylidenetriphenylphosphorane, subsequent deprotection and oxidation gave the pheromone (11Z)-hexadecenal (1). Wittig-Horner olefination of 1 with the phosphonate 9 furnished the conjugated ester 10 which on base catalyzed isomerization to
[...] Read more.
The aldehyde 7, derived from 10-undecenoic acid (5) on cis-selective Wittig reaction with pentylidenetriphenylphosphorane, subsequent deprotection and oxidation gave the pheromone (11Z)-hexadecenal (1). Wittig-Horner olefination of 1 with the phosphonate 9 furnished the conjugated ester 10 which on base catalyzed isomerization to the (3Z)-ester 11 followed by LAH reduction and acetylation gave (3Z,13Z)-octadeadien-1-yl acetate (2). Compound 10 on the other hand was chemoselectively reduced and acetylated to furnish the pheromone (2E,13Z)-octadeadien-1-yl acetate (4). For the synthesis of (3E,13Z)-octadeadien-1-yl acetate (3), 1 was condensed with malonic acid under modified condition to afford the acid 13 which was converted to 3 by standard reaction protocol. Full article
Open AccessArticle Synthesis and Characterization of Heptamethine Cyanine Dyes
Molecules 1997, 2(6), 91-98; doi:10.3390/20600091
Received: 20 March 1997 / Accepted: 11 April 1997 / Published: 11 June 1997
Cited by 10 | PDF Full-text (45 KB)
Abstract
A series of meso-chlorine substituted heptamethine-cyanine dyes and related heptamethine cyanine dyes unsubstituted on the vinyl chain were synthesized by condensation of 2,3,3-trimethyl indolenium salts with reactive intermediates, 2-chloro-formyl-3-hydroxy-methylenecyclohexene or N-[5-(phenylamino)-2,4-phentadienylidene] aniline monohydro-c hloride. The structures of the dyes were characterized by virtue
[...] Read more.
A series of meso-chlorine substituted heptamethine-cyanine dyes and related heptamethine cyanine dyes unsubstituted on the vinyl chain were synthesized by condensation of 2,3,3-trimethyl indolenium salts with reactive intermediates, 2-chloro-formyl-3-hydroxy-methylenecyclohexene or N-[5-(phenylamino)-2,4-phentadienylidene] aniline monohydro-c hloride. The structures of the dyes were characterized by virtue of 1HNMR, 13C-NMR, IR, MS, etc. The reaction conditions and physicochemical properties of the dyes were extensively explored with classical photo-physical techniques Full article

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Open AccessShort Note 2-Ethyl-1-hydroxymethyl-4-trifluoromethyl-9H-carbazole
Molecules 1997, 2(6), M14; doi:10.3390/M14
Received: 11 June 1997 / Published: 16 June 1997
PDF Full-text (103 KB) | Supplementary Files
(This article belongs to the Section Molbank Section of Molecules, 1997-2001)
Open AccessShort Note [2R*,5S*,6S*]-2-Methyl-1,7-dioxaspiro[5.5]undec-3-en-5-ol§
Molecules 1997, 2(6), M15; doi:10.3390/M15
Received: 16 June 1997 / Published: 20 June 1997
PDF Full-text (101 KB) | Supplementary Files
(This article belongs to the Section Molbank Section of Molecules, 1997-2001)
Open AccessShort Note [2R*,5S*,6S*]-2-Methyl-1,7-dioxaspiro[5.5]undec-2-en-5-ol
Molecules 1997, 2(6), M16; doi:10.3390/M16
Received: 16 June 1997 / Published: 20 June 1997
PDF Full-text (81 KB) | Supplementary Files
(This article belongs to the Section Molbank Section of Molecules, 1997-2001)
Open AccessShort Note [3R*,5S*,6S*]-5-Hydroxy-1,7-dioxaspiro[5.5]undec-3-yl 3,5-Dinitrobenzoate
Molecules 1997, 2(6), M17; doi:10.3390/M17
Received: 16 June 1997 / Published: 20 June 1997
PDF Full-text (83 KB) | Supplementary Files
(This article belongs to the Section Molbank Section of Molecules, 1997-2001)
Open AccessShort Note [3R*,5S*,6S*]-1,7-Dioxaspiro[5.5]undecane-3,5-diyl Bis(3,5-dinitrobenzoate)
Molecules 1997, 2(6), M18; doi:10.3390/M18
Received: 16 June 1997 / Published: 20 June 1997
PDF Full-text (89 KB) | Supplementary Files
(This article belongs to the Section Molbank Section of Molecules, 1997-2001)
Open AccessShort Note [4R*,5R*,6S*]-1,7-Dioxaspiro[5.5]undecane-4,5-diol
Molecules 1997, 2(6), M19; doi:10.3390/M19
Received: 18 June 1997 / Published: 20 June 1997
PDF Full-text (85 KB) | Supplementary Files
(This article belongs to the Section Molbank Section of Molecules, 1997-2001)
Open AccessShort Note [3S*,5S*,6S*]-1,7-Dioxaspiro[5.5]undecane-3,5-diol
Molecules 1997, 2(6), M20; doi:10.3390/M20
Received: 18 June 1997 / Published: 20 June 1997
PDF Full-text (80 KB) | Supplementary Files
(This article belongs to the Section Molbank Section of Molecules, 1997-2001)
Open AccessShort Note [4R*,5R*,6S*]-1,7-Dioxaspiro[5.5]undec-4,5-diyl Diacetate
Molecules 1997, 2(6), M21; doi:10.3390/M21
Received: 18 June 1997 / Published: 20 June 1997
PDF Full-text (80 KB) | Supplementary Files
(This article belongs to the Section Molbank Section of Molecules, 1997-2001)
Open AccessShort Note [3S*,5S*,6S*]-1,7-Dioxaspiro[5.5]undecane-3,5-diyl Diacetate
Molecules 1997, 2(6), M22; doi:10.3390/M22
Received: 18 June 1997 / Published: 20 June 1997
PDF Full-text (88 KB) | Supplementary Files
(This article belongs to the Section Molbank Section of Molecules, 1997-2001)
Open AccessOther Synthesis of the Demospongic Compounds, (6Z, 11Z)-Octadecadienoic Acid and (6Z, 11Z)-Eicosadienoic Acid
Molecules 1997, 2(6), 99; doi:10.3390/20600099
Published: 30 June 1997
PDF Full-text (2 KB)

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