By treating arylidenemalononitriles with methyl 2,4-dioxobutanoates, derivatives of 4H-pyrans - methyl 3-acyl-6-amino-4-aryl-5-cyano-4H-pyran-2-carboxylates - are obtained, which are novel, promising structural components for the synthesis of carbo- and heterocycles. The reactions of these pyrans with sulfuric and hydrochloric acids, acetic anhydride, and alcohols have been studied. Novel methods have been developed for the preparation of substituted derivatives of cyclopentenone, pyrano[2,3-d]-pyrimidine, 5-oxo-3-phenylpentanoic acid, and nicotinic acid nitrile.
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Univ Sains Malaysia, Sch Chem Sci, Usm 11800, Penang, MalaysiaUniv Sains Malaysia, Sch Phys, Xray Crystallog Unit, Usm 11800, Penang, Malaysia
Asad, Mohammad
Oo, Chuan-Wei
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Univ Sains Malaysia, Sch Chem Sci, Usm 11800, Penang, MalaysiaUniv Sains Malaysia, Sch Phys, Xray Crystallog Unit, Usm 11800, Penang, Malaysia
Oo, Chuan-Wei
Osman, Hasnah
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Univ Sains Malaysia, Sch Chem Sci, Usm 11800, Penang, MalaysiaUniv Sains Malaysia, Sch Phys, Xray Crystallog Unit, Usm 11800, Penang, Malaysia
Osman, Hasnah
Hemamalini, Madhukar
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Univ Sains Malaysia, Sch Phys, Xray Crystallog Unit, Usm 11800, Penang, MalaysiaUniv Sains Malaysia, Sch Phys, Xray Crystallog Unit, Usm 11800, Penang, Malaysia
Hemamalini, Madhukar
Fun, Hoong-Kun
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Univ Sains Malaysia, Sch Phys, Xray Crystallog Unit, Usm 11800, Penang, MalaysiaUniv Sains Malaysia, Sch Phys, Xray Crystallog Unit, Usm 11800, Penang, Malaysia
机构:
Lanzhou Univ, Coll Chem & Chem Engn, Inst Organ Chem, State Key Lab Appl Organ Chem, Lanzhou 730000, Gansu, Peoples R ChinaLanzhou Univ, Coll Chem & Chem Engn, Inst Organ Chem, State Key Lab Appl Organ Chem, Lanzhou 730000, Gansu, Peoples R China
Dong, Heng-Shan
Wang, Yan-Fei
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Lanzhou Univ, Coll Chem & Chem Engn, Inst Organ Chem, State Key Lab Appl Organ Chem, Lanzhou 730000, Gansu, Peoples R ChinaLanzhou Univ, Coll Chem & Chem Engn, Inst Organ Chem, State Key Lab Appl Organ Chem, Lanzhou 730000, Gansu, Peoples R China
Wang, Yan-Fei
Shen, Guo-Liang
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Lanzhou Univ, Coll Chem & Chem Engn, Inst Organ Chem, State Key Lab Appl Organ Chem, Lanzhou 730000, Gansu, Peoples R ChinaLanzhou Univ, Coll Chem & Chem Engn, Inst Organ Chem, State Key Lab Appl Organ Chem, Lanzhou 730000, Gansu, Peoples R China
Shen, Guo-Liang
Quan, Bin
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Guansu Assoc Univ, Coll Chem & Chem Engn, Lanzhou 730000, Gansu, Peoples R ChinaLanzhou Univ, Coll Chem & Chem Engn, Inst Organ Chem, State Key Lab Appl Organ Chem, Lanzhou 730000, Gansu, Peoples R China
Quan, Bin
Dong, Wang-Jun
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Lanzhou Univ, Coll Chem & Chem Engn, Inst Organ Chem, State Key Lab Appl Organ Chem, Lanzhou 730000, Gansu, Peoples R ChinaLanzhou Univ, Coll Chem & Chem Engn, Inst Organ Chem, State Key Lab Appl Organ Chem, Lanzhou 730000, Gansu, Peoples R China
机构:
Inner Mongolia Med Coll, Dept Pharmaceut Sci, Hohhot 010059, Peoples R ChinaInner Mongolia Med Coll, Dept Pharmaceut Sci, Hohhot 010059, Peoples R China
Yang, Bo
Lu, Yuan
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Inner Mongolia Med Coll, Dept Pharmaceut Sci, Hohhot 010059, Peoples R ChinaInner Mongolia Med Coll, Dept Pharmaceut Sci, Hohhot 010059, Peoples R China
Lu, Yuan
Chen, Chao-Jun
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Inner Mongolia Med Coll, Dept Pharmaceut Sci, Hohhot 010059, Peoples R ChinaInner Mongolia Med Coll, Dept Pharmaceut Sci, Hohhot 010059, Peoples R China
Chen, Chao-Jun
Cui, Jian-Ping
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Inner Mongolia Med Coll, Dept Pharmaceut Sci, Hohhot 010059, Peoples R ChinaInner Mongolia Med Coll, Dept Pharmaceut Sci, Hohhot 010059, Peoples R China
Cui, Jian-Ping
Cai, Meng-Shen
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Peking Univ, Sch Pharmaceut Sci, Beijing 10083, Peoples R ChinaInner Mongolia Med Coll, Dept Pharmaceut Sci, Hohhot 010059, Peoples R China