Zobrazeno 1 - 10 of 165 pro vyhledávání: '"van Leusen, A.M."'
1
Chemistry of sulfonylmethyl isocyanides. 45. A direct synthesis of 2-(trimethylstannyl)pyrroles from Michael acceptors and stannylated tosylmethyl isocyanide
Autor: Dijkstra, HP, ten Have, Ronald, van Leusen, A.M.
Publikováno v: Journal of Organic Chemistry, 63(16), 5332-5338. AMER CHEMICAL SOC INC
A series of 2-(trimethylstannyl)pyrroles 3, with substituents at the 3- and 4-positions, is synthesized efficiently by a base-induced reaction of stannylated TosMIC with Michael accepters. Stills cross-couplings with bromobenzene and double cross-cou
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=narcis______::57aa2663c05334eeac13ad738e2dc696
https://research.rug.nl/en/publications/6c738931-573a-41ec-8b0a-43537c9c7c64
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2
Chemistry of phosphorylmethyl isocyanides, 6 - Cis- and trans-2-(Isocyanomethyl)-5,5-dimethyl-2-oxo-4-phenyl-1,3,2-dioxaphosphorinane - Synthesis and structure of the first chiral isocyanomethylphosphonate synthons
Autor: Weener, JW, Versleijen, JPG, Meetsma, A, ten Hoeve, W, van Leusen, A.M.
Publikováno v: European Journal of Organic Chemistry, 1511-1516. WILEY-V C H VERLAG GMBH
ISSUE=8;STARTPAGE=1511;ENDPAGE=1516;ISSN=1434-193X;TITLE=European Journal of Organic Chemistry
Both cis-2-(isocyanomethyl)-5,5-dimethyl-2-oxo-4-phenyl-1,3,2-dioxaphosphorinane (1a) and the trans epimer 1b have been prepared as potentially useful chiral isocyanomethylphosphonate synthons. 2-Methoxy-1,3,2-dioxaphosphorinanes 5 and the correspond
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=narcis______::eddedaca5d5e00534a66f73e44120685
https://research.rug.nl/en/publications/0b519213-d8f6-4080-af52-c3fbff28ff35
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3
A novel synthesis of 3-nitroindoles via electrocyclization of 2,3-(dialk-1-enyl)4-nitropyrroles
Autor: ten Have, Ronald, van Leusen, A.M.
Publikováno v: Tetrahedron, 54(9), 1913-1920. PERGAMON-ELSEVIER SCIENCE LTD
3-Nitroindoles (10) are prepared in good yields via a thermal 6 pi-electrocyclization of 2,3-(dialkenyl)-4-nitropyrroles (4) in nitrobenzene, a solvent which causes in situ aromatization of the initially formed dihydroindoles (8). The corresponding r
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=narcis______::5aaa5ea8b0a495bbb419df747d704eaf
https://research.rug.nl/en/publications/a5269c9c-2753-42c8-8c83-4b3b8cd64468
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5
ON THE SYNTHESIS OF BORON-SUBSTITUTED METHYL ISOCYANIDES - 2-ISOCYANOMETHYL-4,4,5,5-TETRAMETHYL-1,3,2-DIOXABOROLANE
Autor: VERSLEIJEN, JPG, FABER, PM, BODEWES, HH, BRAKER, AH, van Leusen, A., van Leusen, A.M.
Publikováno v: Tetrahedron Letters, 36(12), 2109-2112. PERGAMON-ELSEVIER SCIENCE LTD
Two methodes are described for the conversion of chloromethylboronates into the corresponding formamidomethylboronates, which upon dehydration provide isocyanomethylboronates. The title compound was stable enough to be isolated and characterized.
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=narcis______::26ea615f16c74c8924dbc64ff83efc50
https://research.rug.nl/en/publications/133d2b84-6b65-4171-adf0-d4880cf6b84a
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7
SYNTHESIS OF 17-(2-METHOXY-3-OXAZOLIN-4-YL), 17-(3-OXAZOLIN-4-YL), AND 17-(2-OXAZOLIN-4-YLIDENE)-SUBSTITUTED STEROIDS AND THEIR USE AS PRECURSORS OF CORTICOSTEROIDS
Autor: van Leusen, D., BATIST, JNM, LEI, J, VANECHTEN, E, BROUWER, AC, van Leusen, A.M.
Publikováno v: Journal of Organic Chemistry, 59(19), 5650-5657. AMER CHEMICAL SOC INC
17-(Isocyanotosylmethylene)steroids 4 are useful intermediates in the conversion of 17-oxosteroids into 17-(hydroxyacetyl)steroids. The 21-CH2OH group is effectively introduced by a base-mediated reaction of compounds 4 with formaldehyde and MeOH to
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=narcis______::72cbacda6c0853701bb747039a413485
https://research.rug.nl/en/publications/b6a44de3-4b0e-44ce-83bf-bd3a0ea1ef62
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8
CHEMISTRY OF PHOSPHORYLMETHYL ISOCYANIDES .5. INTRODUCTION OF 20-KETO SIDE-CHAINS IN 17-OXOSTEROIDS - WITTIG-HORNER-EMMONS REACTIONS OF (E)-17-[(DIETHYLPHOSPHONO)ISOCYANOMETHYLENE]-3-METHOXYANDROSTA-3,5-DIENE
Autor: STOELWINDER, J, van Leusen, A.M.
Publikováno v: Journal of Organic Chemistry, 58(14), 3687-3691. AMER CHEMICAL SOC INC
The synthesis is described of a series of polyfunctional unsaturated DELTA16,20-20-isocyanosteroids 5a-f by the Wittig-Horner-Emmons reaction of (E)-17-[(diethylphosphono)isocyanomethylene] steroid 4 with several aldehydes and with acetone. Hydrolysi
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=narcis______::08c9ca46da1208c6274aeacb68ca70bb
https://research.rug.nl/en/publications/3f86de06-aeb9-4a0a-ab8b-e409c2057f92
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9
CHEMISTRY OF SULFONYLMETHYL ISOCYANIDES .38. SYNTHESIS OF 20-OXO STEROIDS
Autor: van Leusen, Daan, vn Echten, Erik, van Leusen, A.M.
Publikováno v: Recueil des Travaux Chimiques des Pays-Bas-Journal of the Royal Netherlands Chemical Society, 111(11), 469-477. ELSEVIER SCIENCE BV
The synthesis is described of a series of eighteen 16-dehydro-20-isocyano-20-sulfonyl-pregnanes (5 and 8-14) by C-20 alkylation of 17-[isocyano(sulfonyl)methylene]androstanes 1-3. The geminal isocyano and sulfonyl groups at C-20 (compounds 5, 8-14) a
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=narcis______::634b325ca6c62f8f80c719986a70a19d
https://research.rug.nl/en/publications/a325c6fc-93c8-4267-81cd-534c5bab5200
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10
CHEMISTRY OF SULFONYLMETHYL ISOCYANDES. 39. GENERATION OF 2,3-DIMETHYLENE-2,3-DIHYDROPYRROLE DERIVATIVES - INTERMEDIATES IN INTRAMOLECULAR AND INTERMOLECULAR DIELS-ALDER REACTIONS
Autor: LEUSINK, FR, ten Have, Ronald, VAN DEN BERG, KJ, van Leusen, A.M.
Publikováno v: Journal of the Chemical Society-Chemical Communications, 1401-1402. ROYAL SOC CHEMISTRY
ISSUE=19;STARTPAGE=1401;ENDPAGE=1402;ISSN=0022-4936;TITLE=Journal of the Chemical Society-Chemical Communications
Three different approaches are described for the generation of derivatives of 2,3-dimethylene-2,3-dihydropyrro 2, which are reactive intermediates in Diels-Alder cycloaddition reactions; one of the intramolecular cycloadditions provides a new tricycl
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https://research.rug.nl/en/publications/659a29ad-1c7b-4c57-805e-5e0e87058ec5
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