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Molecules, Volume 6, Issue 1 (January 2001), Pages 1-66

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Editorial

Jump to: Research, Review

Open AccessEditorial Invitation: High Quality Papers with Extensive Literature Review and Full Experimental Details
Molecules 2001, 6(1), ; doi:10.3390/6010000i
Published: 20 January 2000
PDF Full-text (13 KB)

Research

Jump to: Editorial, Review

Open AccessArticle Tricarbonyl(h6-Arene)Chromium(0) Complexes as Chiral Auxiliaries: Asymmetric Synthesis of b-Lactones
Molecules 2001, 6(1), 13-20; doi:10.3390/60100013
Received: 24 July 2000 / Revised: 18 December 2000 / Accepted: 18 December 2000 / Published: 16 January 2001
Cited by 2 | PDF Full-text (82 KB) | HTML Full-text | XML Full-text
Abstract The optically pure tricarbonyl(h6-2-substituted benzaldehydes)chromium are used as chiral auxiliaries in the condensation with a series of doubly lithiated carboxylic acids. The intramolecular ring closure of the obtained Cr(CO)3 complexed b-hydroxyacids affords the optically pure b-lactones in satisfactory yield. Full article
Open AccessArticle A Simple Method for Synthesis of Active Esters of Isonicotinic and Picolinic Acids
Molecules 2001, 6(1), 47-51; doi:10.3390/60100047
Received: 14 May 2000 / Revised: 20 December 2000 / Accepted: 20 December 2000 / Published: 16 January 2001
Cited by 17 | PDF Full-text (40 KB) | HTML Full-text | XML Full-text
Abstract A method for preparation of the p-nitrophenyl-, N-hydroxysuccinimidyl- and pentafluorophenyl esters of isonicotinic and picolinic acids from the corresponding acids is reported. Full article
Open AccessArticle Sensitized Photooxygenation of Cholesterol and Pseudocholesterol Derivatives via Singlet Oxygen
Molecules 2001, 6(1), 52-60; doi:10.3390/60100052
Received: 30 September 1998 / Revised: 4 September 2000 / Accepted: 19 September 2000 / Published: 16 January 2001
Cited by 4 | PDF Full-text (106 KB) | HTML Full-text | XML Full-text
Abstract
3-Substituted cholesterols and 7-substituted pseudocholesterols undergo a facile photooxygenation sensitized by 9, 10-dicyanoanthracene (DCA) and lumiflavin (LF) to give similar, oppositely-positioned enol derivatives. Both steroids showed the same reaction pattern associated with the endocyclic 5- and 4-olefin units, respectively. The reaction was proposed
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3-Substituted cholesterols and 7-substituted pseudocholesterols undergo a facile photooxygenation sensitized by 9, 10-dicyanoanthracene (DCA) and lumiflavin (LF) to give similar, oppositely-positioned enol derivatives. Both steroids showed the same reaction pattern associated with the endocyclic 5- and 4-olefin units, respectively. The reaction was proposed to proceed via the ene reaction of singlet oxygen and subsequent rearrangement of the initially formed 5a-hydroperoxides. Full article
Open AccessArticle Cohalogenation of Allyl and Vinylsilanes using Polymer-bound Haloate(I)-Reagents
Molecules 2001, 6(1), 61-66; doi:10.3390/60100061
Received: 6 December 2000 / Revised: 7 January 2001 / Accepted: 8 January 2001 / Published: 16 January 2001
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Abstract Polymer-supported electrophilic halogenate(I) complexes 2 and 3 promote smooth addition to vinyl and allylsilanes without loss of the silyl group. In conjunction with Amberlyst A26 (OH -form) vinyl silanes are converted into epoxysilanes. Full article

Review

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Open AccessReview Synthesis of Polycyclic Ring Systems Using Transition Metal Catalyzed Cyclizations of Diazo Alkynyl Ketones
Molecules 2001, 6(1), 1-12; doi:10.3390/60100001
Received: 3 November 2000 / Accepted: 6 November 2000 / Published: 22 December 2000
Cited by 17 | PDF Full-text (105 KB) | HTML Full-text | XML Full-text
Abstract
The rhodium(II)-catalyzed reaction of α-diazo ketones bearing tethered alkyne units represents a new and useful method for the construction of a variety of substituted cyclopentenones. The process proceeds by addition of the rhodium-stabilized carbenoid onto the acetylenic π-bond to give a vinyl carbenoid
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The rhodium(II)-catalyzed reaction of α-diazo ketones bearing tethered alkyne units represents a new and useful method for the construction of a variety of substituted cyclopentenones. The process proceeds by addition of the rhodium-stabilized carbenoid onto the acetylenic π-bond to give a vinyl carbenoid intermediate. The resulting rhodium complex undergoes a wide assortment of reactions including cyclopropanation, 1,2-hydrogen migration, CH-insertion, addition to tethered alkynes and ylide formation. When 2-alkynyl-2-diazo-3-oxobutanoates were treated with a Rh(II)-catalyst, furo[3,4-c]furans were formed in excellent yield. Full article
Open AccessReview Bile Acids as Building Blocks of Supramolecular Hosts
Molecules 2001, 6(1), 21-46; doi:10.3390/60100021
Received: 20 October 2000 / Revised: 20 December 2000 / Accepted: 20 December 2000 / Published: 16 January 2001
Cited by 96 | PDF Full-text (272 KB) | HTML Full-text | XML Full-text
Abstract A review of the use of bile acid-based compounds as building blocks for designing novel supramolecular hosts for molecular recognition is presented. Pharmacological applications and the newest spectroscopic and computational studies of bile acid derivatives are also shortly considered. Full article

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