Compr. Heterocyclic Chem. III Vol. 4 Five-membered Rings by Katritzky A.R., et al. (eds.)

By Katritzky A.R., et al. (eds.)

Content material: v. 1. 3-membered heterocycles, including all fused platforms containing a 3-membered heterocyclic ring / quantity editor, Albert Padwa -- v. 2. 4-membered heterocycles including all fused platforms containing a 4-membered heterocyclic ring / quantity editor, Christian Stevens -- v. three. 5-membered jewelry with one heteroatom including their benzo and different carbocyclic-fused derivatives / quantity editors, Gurnos Jones, Christopher A. Ramsden -- v. four. 5-membered earrings with heteroatoms, every one with their fused carbocyclic derivatives / quantity editor, John Joule -- v. five. 5-membered jewelry: triazoles, oxadiazoles, thiadiazoles and their fused carbocyclic derivatives / quantity editor, Viktor V. Zhdankin -- v. 6. different 5-membered jewelry with 3 or extra heteroatoms, and their fused carbocyclic derivatives / quantity editor, Viktor V. Zhdankin -- v. 7. 6-membered earrings with one heteroatom, and their fused carbocyclic derivatives / quantity editor, David StC. Black -- v. eight. 6-membered earrings with heteroatoms, and their fused carbocyclic derivatives / quantity editor, R. Alan Aitken -- v. nine. 6-membered jewelry with 3 or extra heteroatoms, and their fused carbocyclic derivatives / quantity editor, Kenneth Turnbull -- v. 10. Ring structures with at the very least fused heterocyclic 5- or 6-membered earrings without bridgehead heteroatom / quantity editor, Ray C.F. Jones -- v. eleven. Bicyclic 5-5 and 5-6 fused ring structures with at the very least one bridgehead (ring junction) N / quantity editor, Janine Cossy -- v. 12. 5- and 6-membered fused structures with bridgehead (ring junction) heteroatoms concluded: 6-6 bicyclic with one or N or different heteroatoms; polycyclic; spirocyclic / quantity editor, Keith Jones -- v. thirteen. 7-membered heterocyclic jewelry and their fused derivatives / quantity editor, George R. Newkome -- v. 14. 8-membered and bigger heterocyclic jewelry and their fused derivatives, different 7-membered earrings / quantity editor, George R. Newkome -- v. 15. Cumulative topic index

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3-Chloro-1-phenyl-2-pyrazoline underwent Suzuki cross-coupling reactions efficiently with arylboronic acids in good yields under microwave irradiation <2005TL2631>. 5-Bromo-3-iodoindazole has been employed in sequential Sonogashira and Suzuki cross-coupling reactions <2005S771>. 4 Metal and metalloid-linked substituents The Stille reaction of tributylstannylpyrazoles and the Suzuki reaction of pyrazole boronate esters or boronic acids have found several applications in cross-coupling reactions.

The dienophile, 5-amino-1-phenylpyrazole, was generated in situ via decarboxylation and immediately trapped by 1,3,5-triazines leading to 4,6-disubstituted 1-phenylpyrazolo[3,4d]pyrimidines in one step. Diels–Alder reaction of 4-iminopyrazoles 218 with maleimide afforded pyrazolo[3,4-b]pyrrolo[3,4-d]pyridine-6,8(3H,7H)dione 220 via elimination of dimethylamine and air oxidation of intermediate 219 (Scheme 13) <2001TL8931>. 3(5)-(2-Hydroxyphenyl)-5(3)-styrylpyrazoles underwent Diels–Alder cycloaddition with o-benzoquinodimethane followed by oxidation with DDQ in dioxane to give naphthylpyrazoles <2005EJO4348>.

A tandem decarboxylation/Diels–Alder reaction of 5-amino-1-phenyl-4-pyrazolecarboxylic acid with various 1,3,5-triazines has been reported <2001TL8419>. The dienophile, 5-amino-1-phenylpyrazole, was generated in situ via decarboxylation and immediately trapped by 1,3,5-triazines leading to 4,6-disubstituted 1-phenylpyrazolo[3,4d]pyrimidines in one step. Diels–Alder reaction of 4-iminopyrazoles 218 with maleimide afforded pyrazolo[3,4-b]pyrrolo[3,4-d]pyridine-6,8(3H,7H)dione 220 via elimination of dimethylamine and air oxidation of intermediate 219 (Scheme 13) <2001TL8931>.

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