Palladium(II)-Catalyzed Sequential C−Cl Bond Formation: A Novel and Efficient Method for Direct α,α-Dichlorination of β-Dicarbonyl Compounds
摘要:
A simple and concise procedure for the synthesis of 2,2-dichloro-3-oxo-N-phenylbutanamides, via palladium-catalyzed C(sp(3))-H dichlorination of 3-oxo-N-phenylbutanamides, is described. The protocol provides a direct route to ,-dichlorinated products starting from -dicarbonyl compounds. A plausible mechanism for this transformation involving two consecutive chlorination steps is described.
Unexpected formation of new bicyclic γ-lactams by dimerization of α-chloroacetoacetanilides
摘要:
Novel and unusual dimerization reaction of alpha-chloroacetoacetanilide under basic reaction condition to give structurally unique 6-oxa-3-azabicyclo[3.1.0]hexane was described. (c) 2008 Published by Elsevier Ltd.
Facile synthesis of thiadiazolo [2,3-b] quinazoline derivatives via the Japp-Klingemann Reaction
作者:Abdou O. Abdelhamid、Hamdi M. Hassaneen、Ikhlass M. Abbas、Ahmad S. Shawali
DOI:10.1016/0040-4020(82)80243-3
日期:1982.1
Diazotized anathranilic acid and its methyl ester react with substituted α-thiocyanatoacetoacetanilides3a–c to give in both cases the corresponding thiadiazolo [2,3-b] quinazolines6a–c, respectively. A mechanism is proposed and it is substantiated by synthesis of6a from N-(2-car☐yphenyl)-C-phenylcarbamoyl hydrazidoyl chloride8a or its N-(2-methoxycarbonylcarbonylphenyl) analogue8d.
重氮化的邻氨基苯甲酸及其甲酯与取代的α-硫氰酸根乙酰乙酰苯胺3a-c反应,在两种情况下分别给出相应的噻二唑并[2,3 - b ]喹唑啉6a-c。提出了一种机理,并通过由N-(2-car☐yphenyl)-C-苯基氨基甲酰基肼基十二烷基氯8a或其N-(2-甲氧基羰基羰基苯基)类似物8d合成6a来证实其机理。
Kettrup,A.; Abshagen,J., Zeitschrift fur Naturforschung. Teil B. Anorganische Chemie, organische Chemie, Biochemie, Biophysik, Biologie, 1970, vol. 25, p. 1386 - 1388
作者:Kettrup,A.、Abshagen,J.
DOI:——
日期:——
Sharaf, Mohie A. F.; Ezat, El-Emam H. M.; Hammouda, Hamdy A. A., Phosphorus, Sulfur and Silicon and the Related Elements, 1994, vol. 92, # 1-4, p. 19 - 28
作者:Sharaf, Mohie A. F.、Ezat, El-Emam H. M.、Hammouda, Hamdy A. A.
DOI:——
日期:——
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