By Marco Bandini
The sequence subject matters in Heterocyclic Chemistry offers severe reports on current and destiny developments within the study of heterocyclic compounds. total the scope is to hide issues facing all parts inside of heterocyclic chemistry, either experimental and theoretical, of curiosity to the final heterocyclic chemistry group. The sequence comprises subject comparable volumes edited by means of popular editors with contributions of specialists within the box. All chapters from issues in Heterocyclic Chemistry are released on-line First with anyone DOI. In references, subject matters in Heterocyclic Chemistry is abbreviated as best Heterocycl Chem and stated as a journal
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Extra resources for Au-Catalyzed Synthesis and Functionalization of Heterocycles
Synthesis 3183–3204 94. Zhang LM, Kozmin SA (2005) Gold-catalyzed assembly of heterobicyclic systems. J Am Chem Soc 127:6962–6963 95. Toullec PY, Blarre T, Michelet V (2009) Mimicking polyolefin carbocyclization reactions: gold-catalyzed intramolecular phenoxycyclization of 1,5-enynes. Org Lett 11:2888–2891 96. Sethofer SG, Mayer T, Toste FD (2010) Gold(I)-catalyzed enantioselective polycyclization reactions. J Am Chem Soc 132:8276–8277 97. Fu¨rstner A, Morency L (2008) On the nature of the reactive intermediates in gold-catalyzed cycloisomerization reactions.
Synlett 707–711 63. Tomas-Mendivil E, Toullec PY, Borge J, Conejero S, Michelet V, Cadierno V (2013) Watersoluble gold(I) and gold(III) complexes with sulfonated N-heterocyclic carbene ligands: synthesis, characterization, and application in the catalytic cycloisomerization of gammaalkynoic acids into enol-lactones. ACS Catal 3:3086–3098 64. Marchal E, Uriac P, Legouin B, Toupet L, van de Weghe P (2007) Cycloisomerization of γand δ-acetylenic acids catalyzed by gold(I) chloride. Tetrahedron 63:9979–9990 65.
Synthesis of Oxygenated Heterocyclic Compounds via Gold-Catalyzed. . tBu tBu P Au-Cl / AgNTf 2 R4O R3 OR4 R3 = alkyl, Ph 211 R1 R3 OAc OR4 R3 OAc . 3 : 1 Scheme 71 Gold-catalyzed migration–fragmentation of ketals 216 and their [3 + 2] cycloadditions Cy2 iPrO P AuCl R2 R3 + iPrO O R1 (5%) R1 Ph 219 O R2 DCE, rt O Ph Ph Ph R1, R2, R3 = Ph, alkyl O 220 O 222 O endo (1) R3 R3 O O Me 221 Ph [Au] R1 + R1 R3 O 78 - 96% exo / endo : from 51 : 49 to 89 :11 R2 Ph O exo Ph R2 R1 IPrAuNTf2 (5%) R2 R1, R2 = aryl, alkyl, H DCE, 80 ºC R1 [Au] R2 Me O Ph (2) Me O Ph 67 - 88% Scheme 72 Cycloadditions of 1,3-furanyl gold dipoles generated from 2-(1-alkynyl)-2-alken-1ones On the other hand, Zhang and coworkers have extensively exploited the cycloadditions of 1,3-furanyl gold dipoles (220) generated from 2-(1-alkynyl)-2-alken-1ones (219) and a gold catalyst.