17298-18-9Relevant articles and documents
The Conversion of 5,6-Dihydro-4-methoxy-2-pyrones into 3-Alkyl-5-hydroxypyrazoles
Ayoub, Mikdad T.,Shandala, Mowafak Y.,Bashi, Galia M. Gussba,Pelter, Andrew
, p. 697 - 699 (1981)
The production and characterisation of 3--5-hydroxy-1H-pyrazoles (2a-d) and 3--5-hydroxy-1H-pyrazole (2e) by the reaction of hydrazine with 6-substituted-5,6-dihydro-4-methoxy-2-pyrones is describ
Synthesis of β-methoxyacrylate natural products based on box-Pd IIcatalyzed intermolecular methoxycarbonylation of alkynoles
Motodate, Satoshi,Kobayashi, Takuya,Fujii, Mikio,Mochida, Tomoyuki,Kusakabe, Taichi,Katoh, Shigeki,Akita, Hiroyuki,Kato, Keisuke
experimental part, p. 2221 - 2230 (2011/06/21)
Bis(oxazoline)-palladium(II) catalyzed carbonylation of homopropargyl alcohols afforded acyclic methoxyacrylate 2 and 6-membered lactone 3a-k in good combined yield. In the case of propargyl alcohols, 5-membered lactones 3p, 3q, 16 were obtained in moderate yields. The one-pot synthesis of kawa lactones 3a, 3r, 3s and formal synthesis of dihydroxycystothiazole A and dihydroxycystothiazole C are presented. To elucidate the stereochemistry of (+)-annularin G and (-)-annularin H, the first asymmetric syntheses of these natural products were achieved.
Polymer-supported electron-rich diene for hetero Diels-Alder reactions
Pierres, Camille,George, Pascal,Van Hijfte, Luc,Ducep, Jean-Bernard,Hibert, Marcel,Mann, André
, p. 3645 - 3647 (2007/10/03)
A Brassard diene analogue was grafted on a modified Merrifield resin and used in a hetero Diels-Alder reaction with various aldehydes or ketones. The reaction gave access to 6-substituted 5,6-dihydropyrones (5a-u). This new immobilized electron-rich diene is more stable than the corresponding native diene, and is a versatile supported reagent.
