Photochemical ring contraction of 4??heteroaryl??substituted 1, 4 (or 3, 4)??dihydropyrimidines into imidazoles

RE Van der Stoel, HC van der Plas…

Index: Stoel, R. E. van der; Plas, H. C. van der; Jongejan, H. Recueil: Journal of the Royal Netherlands Chemical Society, 1983 , vol. 102, # 7-8 p. 364 - 367

Full Text: HTML

Citation Number: 5

Abstract

Abstract Photolysis of 4-R-1, 4 (or 3, 4)-dihydropyrimidines causes ring contraction into imidazoles, provided that the substituent R is capable of sufficiently stabilizing an anionic centre (R= 2-thiazolyl, 2-pyridyl, 4-pyridyl). Chemical evidence is presented to show that the

Related Articles:

Highly active and recyclable silica gel-supported palladium catalyst for mild cross-coupling reactions of unactivated heteroaryl chlorides

[Lee, Dong-Hwan; Jung, Ji-Young; Jin, Myung-Jong Green Chemistry, 2010 , vol. 12, # 11 p. 2024 - 2029]

Molecular squares, rectangles and infinite helical chains utilising the simple 'corner'ligand 4-(2-pyridyl)-pyrimidine

[Beauchamp, Derek A.; Loeb, Stephen J. Chemical Communications, 2002 , # 21 p. 2484 - 2485]

Synthesis of a Novel Series of 6, 6'??Disubstituted 4, 4'??Bipyrimidines by Radical Anion Coupling: New π??Accepting Ligands for Coordination Chemistry

[Ioachim, Elena; Medlycott, Elaine A.; Polson, Matthew I. J.; Hanan, Garry S. European Journal of Organic Chemistry, 2005 , # 17 p. 3775 - 3780]

Synthesis of pyrimidines from ketones using microwave irradiation

[Tyagarajan, Sriram; Chakravarty, Prasun K. Tetrahedron Letters, 2005 , vol. 46, # 46 p. 7889 - 7891]

Deprotonative metalation of substituted benzenes and heteroaromatics using amino/alkyl mixed lithium–zinc combinations

[Snegaroff, Katia; Komagawa, Shinsuke; Chevallier, Floris; Gros, Philippe C.; Golhen, Stephane; Roisnel, Thierry; Uchiyama, Masanobu; Mongin, Florence Chemistry - A European Journal, 2010 , vol. 16, # 27 p. 8191 - 8201]

More Articles...