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  • About
  • The Global ETD Search service is a free service for researchers to find electronic theses and dissertations. This service is provided by the Networked Digital Library of Theses and Dissertations.
    Our metadata is collected from universities around the world. If you manage a university/consortium/country archive and want to be added, details can be found on the NDLTD website.
51

A Diels-Alder approach to biaryl synthesis /

Ashburn, Bradley O. January 1900 (has links)
Thesis (Ph. D.)--Oregon State University, 2008. / Printout. Includes bibliographical references (leaves 248-257). Also available on the World Wide Web.
52

Synthèse totale énantiosélective de la (11R)-(-)-8-épi-11-hydroxy-aphidicoline par réactions de Diels-Alder/aldol transannulaires en tandem

Belanger, Guillaume. January 2000 (has links)
Thèses (Ph.D.)--Université de Sherbrooke (Canada), 2000. / Titre de l'écran-titre (visionné le 20 juin 2006). Publié aussi en version papier.
53

Synthèse de composés tricycliques par réaction de Diels-Alder transannulaire sur des triènes macrocycliques CTT et TCC diversement fonctionnalisés

Lavoie, Rico. January 1997 (has links)
Thèses (M.Sc.)--Université de Sherbrooke (Canada), 1997. / Titre de l'écran-titre (visionné le 20 juin 2006). Publié aussi en version papier.
54

Travaux sur la synthèse totale énantiosélective de la (+)-aphidicoline via les réactions de Diels-Alder/Aldol transannulaires en tandem

Bilodeau, François. January 2003 (has links)
Thèses (M.Sc.)--Université de Sherbrooke (Canada), 2003. / Titre de l'écran-titre (visionné le 20 juin 2006). Publié aussi en version papier.
55

Study of Diels-Alder reactions in the syntheses of Yuehchukene analogues and optically active Yuehchukene /

Cao, Guo-an. January 1993 (has links)
Thesis (Ph. D.)--University of Hong Kong, 1993.
56

A synthetic approach to Yuehchukene analogues via alpha beta-unsaturated-2-acylindoles /

Chan, Kwok-pong. January 1900 (has links)
Thesis (M. Phil.)--University of Hong Kong, 1990.
57

Synthetic studies of N-benzenesulphonyl-6-oxo-5,6,8,9,10,10a-hexahydroindeno [2,1-b]indole and related compounds as intermediates of C-7 substituted Yuehchukene analogues /

Wong, Wai-hung. January 1900 (has links)
Thesis (M. Phil.)--University of Hong Kong, 1991.
58

Structure of the "Labile," red pyridine--dimethyl acetylenedicarboxylate adduct

Lease, Mary Frances, January 1964 (has links)
Thesis (Ph. D.)--University of Wisconsin--Madison, 1964. / Typescript. Vita. eContent provider-neutral record in process. Description based on print version record. Includes bibliographical references (leaves 211-213).
59

Cycloadditions in aqueous media

Wijnen, Jan Willem. January 1997 (has links)
Proefschrift Rijksuniversiteit Groningen. / Datum laatste controle: 30-06-1007. Lit.opg. - Met een samenvatting in het Nederlands.
60

Diels-Alder routes to Prosopis alkaloids

Birkinshaw, Timothy Nicholas January 1987 (has links)
This thesis describes the investigation of the Diels-Alder reaction of the imine (140) with the diene (141) to give four products (142,143,156, 157). At low temperatures the enone (156) is the major product while at ambient temperature the bicyclic compounds (142) and (143) predominate. The reaction is highly solvent dependent, with the best results being obtained in benzene solution. Lewis acids appear to have little effect on the course of the reaction. The reaction of the imine (140) with the TBDMSO diene (159) gives the silyl enol ethers (160) and (161) as well as the above four products. Possible mechanisms are discussed. COOM. OSIM., In order to investigate asymmetric induction the 8- phenylmenthyl derived imine (194) was reacted with the diene (141) under a variety of conditions but no asymmetric induction was seen in the exo adducts, and only a small degree in the endo adducts. The bromination and Baeyer-Villiger oxidation of the ketone (142) were investigated and the resultant lactone (209) was converted into the bromide (258). ISOPROSOPININE A (84) ISOPROSOPININE B (S3) Several methods to prepare a suitable side chain for isoprosopinine A were investigated. The prosopis alkaloids isoprosopinine A (84) and B (85) were prepared by alkylation of the sulphones (252) and (266) with the bromide (258) followed by reductive removal of the N-tosyl and sulphone moieties with sodium amalgam. The imine (274) has been prepared and shown to undergo a Lewis acid catalysed imino-Diels-Alder reaction with the diene (141) to give the adducts (283) and (284). hCH,M=CHCOjM» (2T4) Alternative imines for asymmetric synthesis, such as (299) and (288) have been investigated. Preparation of the sulphinamide imine (299) has proved difficult. Attempts to carry out aqueous Diels-Alder reactions of the silyloxydiene (159) with iminium ions, generated in situ from amines, aldehydes and acids, have proved fruitless.

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