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Drug impurity profiling strategies

Talanta (Oxford), 1997-09, Vol.44 (9), p.1517-1526

1997

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Estimation of impurity profiles of drugs and related materials: Part 19: Theme with variations. Identification of impurities in 3-oxosteroids

Journal of pharmaceutical and biomedical analysis, 1998-12, Vol.18 (4), p.511-525

1998

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Estimation of impurity profiles of drugs and related materials Part 18. Impurities and degradation products of mazipredone

Journal of pharmaceutical and biomedical analysis, 1998-09, Vol.17 (6), p.1029-1036

1998

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Estimation of impurity profiles of drugs and related materials Part 16: Identification of the side-products of the ethinylation step in the synthesis of contraceptive gestogens

Journal of pharmaceutical and biomedical analysis, 1997-06, Vol.15 (9), p.1343-1349

1997

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Protonation of the Pyrimidine Ring at the C(5) Position: Formation of a Stable Cationic σ-Complex

Journal of the American Chemical Society, 2003-03, Vol.125 (9), p.2535-2540

2003

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Estimation of impurity profiles of drugs and related materials Part 15. Identification of minor impurities in cimetidine

Journal of pharmaceutical and biomedical analysis, 1996-10, Vol.15 (1), p.1-5

1996

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Estimation of impurity profiles of drugs and related materials

Journal of pharmaceutical and biomedical analysis, 1998-12, Vol.18 (4-5), p.511-525

1998

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Synthesis of Vinca Alkaloids and Related Compounds. 90. New Results in the Synthesis of Alkaloids with the Aspidospermane Skeleton. First Total Synthesis of (±)-3-Oxominovincine

Journal of organic chemistry, 1997-12, Vol.62 (26), p.9188-9191

1997

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Structural elucidation of two novel ergot alkaloid impurities in alpha-ergokryptine and bromokryptine

Acta pharmaceutica Hungarica, 1994-05, Vol.64 (3), p.105

1994

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Synthesis of vinca alkaloids and related compounds. 64. Total syntheses of (.+-.)-pseudovincadifformine and (.+-.)-20-epipseudovincadifformine

Journal of organic chemistry, 1993-10, Vol.58 (22), p.6076-6082

1993

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Synthesis of vinca alkaloids and related compounds part 94. Epimerization of compounds with aspidospermane and D-secoaspidospermane skeleton

Journal of heterocyclic chemistry, 2000-03, Vol.37 (2), p.245-251

2000

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Electrochemical synthesis of pyrido[1,2-a]pyrimidine derivatives. II: Electrochemical reduction of 2,6-dimethyl-3-ethyl-4-oxo-4H-pyrido[1,2-a]pyrimidine in aqueous media

Journal of applied electrochemistry, 1985, Vol.15 (1), p.145-150

1985

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Estimation of impurity profiles of drugs and related materials. Part 18. Impurities and degradation products of mazipredone: Pharmaceutical and biomedical analysis 1983-1997: The end of an era

Journal of pharmaceutical and biomedical analysis, 1998, Vol.17 (6-7), p.1029-1036

1998

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Quantitative MS methods for the determination of drug impurities

International journal of mass spectrometry and ion physics, 1983, Vol.48, p.269-272

1983

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The MS study of triphenyl-methane derivatives

International journal of mass spectrometry and ion physics, 1983-01, Vol.47, p.495-498

1983

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Synthesis of vinca alkaloids and related compounds. LXIII : A new synthetic pathway for preparing alkaloids and related compounds with the aspidosperma skeleton. Total syntheses of (±)-vincadifformine, (±)-tabersonine, and (±)-3-oxotabersonine

Journal of organic chemistry, 1993, Vol.58 (6), p.1434-1442

1993

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Synthesis of vinca alkaloids and related compounds. LXIIII: Total syntheses of (±)-pseudovincadifformine and (±)-pseudovincadifformine and (±)-20-epipseudovincadifformine

Journal of organic chemistry, 1993, Vol.58 (22), p.6076-6082

1993

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The MS investigation of 3,6-disubstituted-5,6-dihydro-4H-1,2,4-oxadiazine derivatives

International journal of mass spectrometry and ion physics, 1983-01, Vol.47, p.419-422

1983

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Synthesis of Vinca alkaloids and related compounds. 37. Some new reactions of (.+-.)-C-norquebrachamine and its derivatives

Journal of organic chemistry, 1988-01, Vol.53 (1), p.42-45

1988

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Synthesis of vinca alkaloids and related compounds, 73. Synthesis and ring transformations of deethylaspidospermane derivatives. Synthesis of (±)-20-deethyl-3-oxotabersonine

Liebigs Annalen, 1995-07, Vol.1995 (7), p.1245-1251

1995

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Synthesis of vinca alkaloids and related compounds. XXXVII: Some new reactions of (±)-C-norquebrachamine and its derivatives

Journal of organic chemistry, 1988, Vol.53 (1), p.42-45

1988

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Synthesis of vinca alkaloids and related compounds. XXXV: Preparation of 1-ethyl-1-hydroxyethyl-octahydroindolo[2,3-a]quinolizine derivatives and reactions of their mesylates with cyanide ion

Heterocycles, 1988, Vol.27 (5), p.1179-1190

1988

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The formation of phosphepine 1-oxides in the reaction of 1,2-dihydrophosphinine 1-oxoides with dichlorocarbene

Phosphorus, sulfur, and silicon and the related elements, 1989, Vol.46 (1-2), p.69-77

1989

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Synthesis of vinca alkaloids and related compounds. XXV: A new approach to (±)-tetrahydrosecodin-17-ol, (.9â)-tetrahydrosecodine, (±)-vincadifformine, (±)-ψ-vincadifformine and (±)-minovine

Heterocycles, 1985, Vol.23 (11), p.2783-2787

1985

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Synthesis of vinca alkaloids and related compounds. LIII, A simple synthesis of (±)-3-oxovincadifformine and (±)-3-oxominovine

Heterocycles, 1990, Vol.31 (7), p.1183-1188

1990

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Drug impurity profiling strategies

Estimation of impurity profiles of drugs and related materials: Part 19: Theme with variations. Identification of impurities in 3-oxosteroids

Estimation of impurity profiles of drugs and related materials Part 18. Impurities and degradation products of mazipredone

Estimation of impurity profiles of drugs and related materials Part 16: Identification of the side-products of the ethinylation step in the synthesis of contraceptive gestogens

Protonation of the Pyrimidine Ring at the C(5) Position: Formation of a Stable Cationic σ-Complex

Estimation of impurity profiles of drugs and related materials Part 15. Identification of minor impurities in cimetidine

Estimation of impurity profiles of drugs and related materials

Synthesis of Vinca Alkaloids and Related Compounds. 90. New Results in the Synthesis of Alkaloids with the Aspidospermane Skeleton. First Total Synthesis of (±)-3-Oxominovincine

Structural elucidation of two novel ergot alkaloid impurities in alpha-ergokryptine and bromokryptine

Synthesis of vinca alkaloids and related compounds. 64. Total syntheses of (.+-.)-pseudovincadifformine and (.+-.)-20-epipseudovincadifformine

Synthesis of vinca alkaloids and related compounds part 94. Epimerization of compounds with aspidospermane and D-secoaspidospermane skeleton

Electrochemical synthesis of pyrido[1,2-a]pyrimidine derivatives. II: Electrochemical reduction of 2,6-dimethyl-3-ethyl-4-oxo-4H-pyrido[1,2-a]pyrimidine in aqueous media

Estimation of impurity profiles of drugs and related materials. Part 18. Impurities and degradation products of mazipredone: Pharmaceutical and biomedical analysis 1983-1997: The end of an era

Quantitative MS methods for the determination of drug impurities

The MS study of triphenyl-methane derivatives

Synthesis of vinca alkaloids and related compounds. LXIII : A new synthetic pathway for preparing alkaloids and related compounds with the aspidosperma skeleton. Total syntheses of (±)-vincadifformine, (±)-tabersonine, and (±)-3-oxotabersonine

Synthesis of vinca alkaloids and related compounds. LXIIII: Total syntheses of (±)-pseudovincadifformine and (±)-pseudovincadifformine and (±)-20-epipseudovincadifformine

The MS investigation of 3,6-disubstituted-5,6-dihydro-4H-1,2,4-oxadiazine derivatives

Synthesis of Vinca alkaloids and related compounds. 37. Some new reactions of (.+-.)-C-norquebrachamine and its derivatives

Synthesis of vinca alkaloids and related compounds, 73. Synthesis and ring transformations of deethylaspidospermane derivatives. Synthesis of (±)-20-deethyl-3-oxotabersonine

Synthesis of vinca alkaloids and related compounds. XXXVII: Some new reactions of (±)-C-norquebrachamine and its derivatives

Synthesis of vinca alkaloids and related compounds. XXXV: Preparation of 1-ethyl-1-hydroxyethyl-octahydroindolo[2,3-a]quinolizine derivatives and reactions of their mesylates with cyanide ion

The formation of phosphepine 1-oxides in the reaction of 1,2-dihydrophosphinine 1-oxoides with dichlorocarbene

Synthesis of vinca alkaloids and related compounds. XXV: A new approach to (±)-tetrahydrosecodin-17-ol, (.9â)-tetrahydrosecodine, (±)-vincadifformine, (±)-ψ-vincadifformine and (±)-minovine

Synthesis of vinca alkaloids and related compounds. LIII, A simple synthesis of (±)-3-oxovincadifformine and (±)-3-oxominovine

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