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Yusuf Ahmad

Pakistan Council of Scientific and Industrial Research

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Featured researches published by Yusuf Ahmad.

Tetrahedron | 1964

Quinoxaline derivatives—III : Cyclization of α-cyano-o-nitroacetanilides to quinoxaline N-oxides☆

Yusuf Ahmad; M. S. Habib; Ziauddin

Abstract Base catalysed intramolecular cyclization of α-cyano- o -nitroacetanilides (Ia–d) to the corresponding 2-cyano-3-hydroxyquinoxaline 1-oxides (IIa-d) is described, and a mechanism proposed. The cyanoquinoxaline N-oxides (IIa-d) on reduction are deoxygenated with simultaneous loss of the nitrile group, and when heated with concentrated aqueous alkali the nitrile group is replaced quantitatively by an hydroxyl group.

Archive | 1986

Hypcholesterolemic Effect of Allium sativum Linn. and its Potential Protective Action Against Coronary Heart Disease

Yusuf Ahmad

In the literature of traditional medicine garlic (Allium sativum, Linn) is reported to be very effective against heart disease.

Journal of Organic Chemistry | 1968

Quinoxaline derivatives. X. Novel rearrangement of certain quinoxaline N-oxides to 6-benzimidazolinones

Yusuf Ahmad; Muhammad S. Habib; Amina Mohammady; Bushra Bakhtiari; Shamim Ahmad Shamsi

Journal of Organic Chemistry | 1966

Quinoxaline derivatives. IX. An unusual chlorine substitution in quinoxaline N-oxides. Its scope and limitations.

Yusuf Ahmad; Habib Ms; Bakhtiari Z; Bakhtiari B

Journal of Organic Chemistry | 1973

Quinoxaline derivatives. XI. Reaction of quinoxaline 1,4-dioxide and some of its derivatives with acetyl chloride

Yusuf Ahmad; M. S. Habib; M. Ikram Qureshi; M. A. Faroogi

Bulletin of the Chemical Society of Japan | 1966

A Novel Direct Synthesis of the N-Oxides of Quinoline Derivatives

Yusuf Ahmad; Shamim Ahmad Shamsi

Journal of Organic Chemistry | 1971

Pyrazolotriazines from condensation of nitro with amino groups

Peter A. S. Smith; Yusuf Ahmad

Bulletin of the Chemical Society of Japan | 1965

Quinoxaline Derivatives. VI. An Unusual Chlorine Substitution during the Reaction of 3-Hydroxy-2-phenylquinoxaline 1-Oxide with Acetyl Chloride

Yusuf Ahmad; M. S. Habib; Ziauddin; Naz Bashir

Tetrahedron | 1965

Quinoxaline derivatives—IV

Yusuf Ahmad; M. S. Habib; Ziauddin; Naz Bashir

Bulletin of the Chemical Society of Japan | 1965

Quinoxaline Derivatives. VII. The Mechanism of the Formation of 6-Chloro-1,2,3,4,2′,3′-hexahydro-4,1′-dimethyl-3,2′-dioxoquinoxaline-2-spiro-3′-indole from a Quinoxaline N-Oxide Derivative by Nucleophilic Chlorination

Yusuf Ahmad; M. S. Habib; M. Iqbal; M. I. Qureshi; Ziauddin

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M. S. Habib

Pakistan Council of Scientific and Industrial Research

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Ziauddin

Pakistan Council of Scientific and Industrial Research

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Peter A. S. Smith

Scripps Research Institute

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