<> "The repository administrator has not yet configured an RDF license."^^ . <> . . "Gold-Catalyzed C-H Alkynylations with Hypervalent Iodine(III) Reagents"^^ . "In Chapter 2, a gold-catalyzed direct alkynylation for the synthesis of 1,3-enynes using\r\nalkyl 3-aminoacrylates and hypervalent iodine reagents is reported. This reaction,\r\nwhich involves the formation of an alkynyl Au(III) species and a direct C-H activation\r\nof alkyl 3-aminoacrylates, reports twenty-six successful conversions in 62-92% yield\r\nwith excellent functional group tolerance. In addition, only one configuration of 1,3-\r\nenynes containing enamines is produced and no further cyclization product is found.\r\nIn Chapter 3, a gold-catalyzed cascade C(sp3)-H alkynylation/ oxy-alkynylation of β-\r\nketo compounds with hypervalent iodine(III) reagents for the synthesis of tetrasubstituted\r\nfurans is described. The alkynyl Au(III) species plays a crucial role in\r\nAu(I)/Au(III) catalytic cycles. The two operating catalytic cycles include an\r\nalkynylation of activated C(sp3)-H bond and an oxy-alkynylation of an β-alkynyl ketone.\r\nThis simple strategy features mild reaction conditions, high functional group tolerance,\r\nand a wide substrate scope. Furthermore, the synthetic utility of the method was\r\ndemonstrated by diverse functionalizations of the final products. Gram-scale synthesis\r\nand proposed mechanism are also presented.\r\nIn Chapter 4, another gold-catalyzed cascade C(sp3)–H alkynylation/Nitrogenalkynylation\r\nof 2-pyridine compounds with hypervalent iodine(III) reagents for the\r\nsynthesis of poly-substituted indolizines is described. The broad substrate scope, good\r\nfunctional group tolerance and good efficiency render this method useful for organic\r\nsynthesis, especially for the synthesis of nitrogen-containing compounds. Gram-scale\r\nsynthesis and proposed mechanism are also revealed."^^ . "2022" . . . . . . . "Chunyu"^^ . "Han"^^ . "Chunyu Han"^^ . . . . . . "Gold-Catalyzed C-H Alkynylations with Hypervalent Iodine(III) Reagents (PDF)"^^ . . . "Doctoral Thesis_Chunyu Han.pdf"^^ . . . "Gold-Catalyzed C-H Alkynylations with Hypervalent Iodine(III) Reagents (Other)"^^ . . . . . . "indexcodes.txt"^^ . . . "Gold-Catalyzed C-H Alkynylations with Hypervalent Iodine(III) Reagents (Other)"^^ . . . . . . "lightbox.jpg"^^ . . . "Gold-Catalyzed C-H Alkynylations with Hypervalent Iodine(III) Reagents (Other)"^^ . . . . . . "preview.jpg"^^ . . . "Gold-Catalyzed C-H Alkynylations with Hypervalent Iodine(III) Reagents (Other)"^^ . . . . . . "medium.jpg"^^ . . . "Gold-Catalyzed C-H Alkynylations with Hypervalent Iodine(III) Reagents (Other)"^^ . . . . . . "small.jpg"^^ . . "HTML Summary of #30611 \n\nGold-Catalyzed C-H Alkynylations with Hypervalent Iodine(III) Reagents\n\n" . "text/html" . . . "540 Chemie"@de . "540 Chemistry and allied sciences"@en . .