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Woudenberg RH, Lie TS, Maat L. Rigid etheno-bridged metopon analogues from Diels-Alder reaction of 5-methylthebaine. (Chemistry of opium alkaloids, Part XXXII). ACTA ACUST UNITED AC 2010. [DOI: 10.1002/recl.19901090507] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
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Noordam A, Maat L, Beyerman HC. Stereoselective synthesis of (+)-pilocarpine, an imidazole alkaloid used in ophthalmology (Imidazole Chemistry, Part VII). ACTA ACUST UNITED AC 2010. [DOI: 10.1002/recl.19790980711] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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53
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Maat L, Wulkan RW. Chiroptical properties of 2-alkylaziridines and their N
-methyl derivatives. ACTA ACUST UNITED AC 2010. [DOI: 10.1002/recl.19811000508] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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54
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Beyerman HC, Maat L, Visser JP. Optical rotatory dispersion of pelletierine, confirmation of the absolute configuration. ACTA ACUST UNITED AC 2010. [DOI: 10.1002/recl.19670860112] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
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Beyerman HC, Maat L. Resolution of isopelletierine: A second synthesis of pelletierine. ACTA ACUST UNITED AC 2010. [DOI: 10.1002/recl.19650840314] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
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Linders JTM, Maat L. Face Selectivity of the Diels-Alder Reaction of Thebaine-Like Morphinandienes, A Computational Approach (Chemistry of Opium Alkaloids, Part XXXI). ACTA ACUST UNITED AC 2010. [DOI: 10.1002/bscb.19890980405] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
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Linders JTM, Lipman PJL, Saly E, Lie TS, Maat L. Diels-Alder Adducts From 4-O-Acetyl-6-Demethoxy-N-Formyl-β-Dihydro-N-Northebaine With Methyl Vinyl Ketone and Nitroethene (Chemistry of Opium Alkaloids, Part XXIX). ACTA ACUST UNITED AC 2010. [DOI: 10.1002/bscb.19890980404] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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58
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De Wit D, Qing CY, van Rantwijk F, Maat L, Kieboom APG. Synthesis of Hydrazone Derivatives From 1,2:5,6-Di-O-Isopropylidene-α-D-Ribo-Hexofuranos-3-Ulose. ACTA ACUST UNITED AC 2010. [DOI: 10.1002/bscb.19921010411] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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Cappon JJ, Linders JTM, Maat L. Hydrogen Bonds in Ethenoisomorphinan-7α-Carboxamides Studied by Molecular Modelling (Chemistry of Opium Alkaloids, Part XXXIV. ACTA ACUST UNITED AC 2010. [DOI: 10.1002/bscb.19900991011] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
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Dijke E, Velthuis J, Balk A, Korevaar S, Maat L, Weimar W, Baan C. Cytotoxic hyporesponsiveness is associated with high IL-10 mRNA expression in immunosuppressed cardiac allograft patients. J Heart Lung Transplant 2005. [DOI: 10.1016/j.healun.2004.11.289] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022] Open
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van der Sijp J, Vos-de Wael M, Maat L, Damhuis R, van Meerbeeck J. Poor sensitivity of mediastinal staging in left sided non-small cell lung cancer. Lung Cancer 2000. [DOI: 10.1016/s0169-5002(00)80829-6] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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62
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Maat L, Woudenberg RH, Meuzelaar GJ, Linders JT. Chemistry of opium alkaloids. Part 44: synthesis and opioid receptor binding profile of substituted ethenoisomorphinans and ethenomorphinans. Bioorg Med Chem 1999; 7:529-41. [PMID: 10220038 DOI: 10.1016/s0968-0896(98)00267-3] [Citation(s) in RCA: 16] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
7- and 8-substituted 6alpha,14alpha-ethenoisomorphinans were synthesized by reaction of properly substituted morphinan-6,8-dienes (analogues of thebaine) with methyl vinyl ketone or ethyl acrylate. Reaction with the appropriate Grignard reagent gave the 7- and 8-dialkylmethanols, respectively. Cleavage of the 3-methyl ether with KOH/glycol or boron tribromide afforded the 3-hydroxyl derivatives. In general, the compounds with the ethoxycarbonyl or dimethylmethanol substituent at the 8alpha-position showed lower affinity for the mu, kappa, and delta opioid receptor subtypes than the corresponding 7alpha- and 7beta-substituted compounds. Introduction of a chloro substituent in position 18 increased the potency significantly. The 7-substituent could be connected to the 18-position without loss of affinity. 5Beta-alkyl substitution of 6alpha,14alpha-ethenoisomorphinans led to a decrease in affinity for the three opioid receptor subtypes. In the 5beta-methyl series the affinity for the mu and delta receptors increased from 7alpha-dimethylmethanol to 7alpha-methylhexylmethanol. In the 5beta-alkyl series, the affinity for the mu-receptor could be increased by connecting the 5- and 7-substituents, yielding a compound with high mu-selectivity. The new 6beta,14beta-ethenomorphinans did not show affinity for any of the opioid receptors, in accordance with the inactivity earlier found in in vivo experiments.
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Woudenberg RH, van Koningsveld H, Maat L. Structure of a Diels–Alder adduct at a 5,7-disubstituted thebaine derivative. Acta Crystallogr C 1994. [DOI: 10.1107/s0108270193010777] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 04/03/2023] Open
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Qing CY, de Wit D, van Rantwijk F, van Koningsveld H, Maat L. Structure of a phenylhydrazone of diacetone protected 3-keto-glucose. Acta Crystallogr C 1992. [DOI: 10.1107/s0108270192002798] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022] Open
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67
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Woudenberg RH, Lie TS, van Koningsveld H, Maat L. Structure of 5β,10α,10β-triethylthebaine hydrochloride. Acta Crystallogr C 1992. [DOI: 10.1107/s0108270192000994] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022] Open
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68
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de Wit D, van den Berg R, Johansson LA, van Rantwijk F, Maat L, Kieboom AP. The periodate oxidation of sucrose in aqueous N,N-dimethylformamide. Carbohydr Res 1992; 226:253-60. [PMID: 1319839 DOI: 10.1016/0008-6215(92)84073-2] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
Abstract
Sucrose has been oxidized with sodium periodate in 0-50% aqueous N,N-dimethylformamide (DMF). In 50% aqueous DMF the reaction is selective for the glucose ring, yielding a dialdehyde. The increased selectivity is not due to conformational factors but is ascribed to the dissociation of water from cyclic periodate ester species which makes the reaction via the acyclic ester on fructose unfavourable.
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Veldman N, Duisenberg AJM, Spek AL, Woudenberg RH, Lie TS, Maat L. Structure of 4,5-epoxy-3-methoxy-N,α,α-trimethylmorphinan-5,8-diene-7α-methanol. Acta Crystallogr C 1991. [DOI: 10.1107/s0108270190011404] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022] Open
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Maat L, van Herwerden LA, van den Brand M, Bos E. An unusual problem during surgical removal of a broken guidewire. Ann Thorac Surg 1991; 51:829-30. [PMID: 2025095 DOI: 10.1016/0003-4975(91)90143-e] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/29/2022]
Abstract
At operation, it proved impossible using traction alone to remove an angioplasty guidewire that was lodged in an intermediate artery. The problem was solved by passing a Teflon catheter over the wire, thus protecting the left main coronary artery while freeing the entrapped distal end of the guidewire.
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Spek AL, Cappon JJ, Lie TS, Maat L. Structure of N-(3,6-dimethoxy-17-methyl-4,5-epoxy-6,14α-etheno-7α-isomorphinanylcarbonyl)-L-phenylalanine ethyl ester hydrochloride. Acta Crystallogr C 1990. [DOI: 10.1107/s0108270190002517] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022] Open
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72
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van Koningsveld H, Linders JTM, Booth RJ, Lie TS, Maat L. Structure of an unexpected dibenz[d, f]azonine from the HBr elimination of N-formyl-N-norbromocodide. Acta Crystallogr C 1990. [DOI: 10.1107/s0108270189005925] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022] Open
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73
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van Koningsveld H, Jansen JC, Overhand M, Lie TS, Maat L. Structure of a new deoxygenated etorphine analogue. Acta Crystallogr C 1987. [DOI: 10.1107/s0108270187087675] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022] Open
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74
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van Koningsveld H, Jansen JC, Overhand M, Maat L, Lie TS. Structure of a novel Diels–Alder adduct derived from a thebaine analogue. Acta Crystallogr C 1987. [DOI: 10.1107/s0108270187090231] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022] Open
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75
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van Koningsveld H, Jansen JC, Lie TS, Maat L. Structure of (+)-5,6,7,8-tetradehydro-3-methoxy-17-methylmorphinan-4-ol hemihydrate, a potential morphinadien for Diels–Alder reactions. Acta Crystallogr C 1986. [DOI: 10.1107/s0108270186097159] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022] Open
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